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Finding the Fourth Proportional to 15,956.71, 22,019.39 and 8,785.22

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Solution

The fourth proportional to 15,956.71, 22,019.39 and 8,785.22 is: 12,123.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,956.71 : 22,019.39 = 8,785.22 : x
  2. Step 2: Convert to fraction form
    15,956.71/22,019.39 = 8,785.22/x
  3. Step 3: Cross multiply
    15,956.71x = 22,019.39 × 8,785.22
  4. Step 4: Simplify right side
    15,956.71x = 193,445,196.54
  5. Step 5: Solve for x
    x = 193,445,196.54/15,956.71
  6. Step 6: Final answer
    x = 12,123.13

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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.