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Finding the Fourth Proportional to 15,059.50, 20,781.52 and 8,345.23

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Solution

The fourth proportional to 15,059.50, 20,781.52 and 8,345.23 is: 11,516.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.50 : 20,781.52 = 8,345.23 : x
  2. Step 2: Convert to fraction form
    15,059.50/20,781.52 = 8,345.23/x
  3. Step 3: Cross multiply
    15,059.50x = 20,781.52 × 8,345.23
  4. Step 4: Simplify right side
    15,059.50x = 173,426,491.33
  5. Step 5: Solve for x
    x = 173,426,491.33/15,059.50
  6. Step 6: Final answer
    x = 11,516.09

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Double scale
Find fourth proportional to 15,060.50, 20,782.90 and 8,346.23
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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.