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Finding the Fourth Proportional to 15,098.81, 20,834.57 and 8,725.32

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Solution

The fourth proportional to 15,098.81, 20,834.57 and 8,725.32 is: 12,039.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,098.81 : 20,834.57 = 8,725.32 : x
  2. Step 2: Convert to fraction form
    15,098.81/20,834.57 = 8,725.32/x
  3. Step 3: Cross multiply
    15,098.81x = 20,834.57 × 8,725.32
  4. Step 4: Simplify right side
    15,098.81x = 181,788,312.13
  5. Step 5: Solve for x
    x = 181,788,312.13/15,098.81
  6. Step 6: Final answer
    x = 12,039.91

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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.