Home / 12,123.39-16,729.70-6,818.79

Finding the Fourth Proportional to 12,123.39, 16,729.70 and 6,818.79

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Solution

The fourth proportional to 12,123.39, 16,729.70 and 6,818.79 is: 9,409.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,123.39 : 16,729.70 = 6,818.79 : x
  2. Step 2: Convert to fraction form
    12,123.39/16,729.70 = 6,818.79/x
  3. Step 3: Cross multiply
    12,123.39x = 16,729.70 × 6,818.79
  4. Step 4: Simplify right side
    12,123.39x = 114,076,276.97
  5. Step 5: Solve for x
    x = 114,076,276.97/12,123.39
  6. Step 6: Final answer
    x = 9,409.60

Related Problems

Find fourth proportional to 6,061.70, 8,364.85 and 3,409.40
Half scale
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Double scale
Find fourth proportional to 12,124.39, 16,731.07 and 6,819.79
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.