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Finding the Fourth Proportional to 15,157.19, 20,916.96 and 8,785.02

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Solution

The fourth proportional to 15,157.19, 20,916.96 and 8,785.02 is: 12,123.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.19 : 20,916.96 = 8,785.02 : x
  2. Step 2: Convert to fraction form
    15,157.19/20,916.96 = 8,785.02/x
  3. Step 3: Cross multiply
    15,157.19x = 20,916.96 × 8,785.02
  4. Step 4: Simplify right side
    15,157.19x = 183,755,911.94
  5. Step 5: Solve for x
    x = 183,755,911.94/15,157.19
  6. Step 6: Final answer
    x = 12,123.35

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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.