Home / 8,123.80-12,185.70-4,612.45

Finding the Fourth Proportional to 8,123.80, 12,185.70 and 4,612.45

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Solution

The fourth proportional to 8,123.80, 12,185.70 and 4,612.45 is: 6,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,123.80 : 12,185.70 = 4,612.45 : x
  2. Step 2: Convert to fraction form
    8,123.80/12,185.70 = 4,612.45/x
  3. Step 3: Cross multiply
    8,123.80x = 12,185.70 × 4,612.45
  4. Step 4: Simplify right side
    8,123.80x = 56,205,931.97
  5. Step 5: Solve for x
    x = 56,205,931.97/8,123.80
  6. Step 6: Final answer
    x = 6,918.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.