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Finding the Fourth Proportional to 22,123.76, 30,530.80 and 12,187.76

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Solution

The fourth proportional to 22,123.76, 30,530.80 and 12,187.76 is: 16,819.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,123.76 : 30,530.80 = 12,187.76 : x
  2. Step 2: Convert to fraction form
    22,123.76/30,530.80 = 12,187.76/x
  3. Step 3: Cross multiply
    22,123.76x = 30,530.80 × 12,187.76
  4. Step 4: Simplify right side
    22,123.76x = 372,102,063.01
  5. Step 5: Solve for x
    x = 372,102,063.01/22,123.76
  6. Step 6: Final answer
    x = 16,819.11

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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.