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Finding the Fourth Proportional to 15,058.68, 20,781.76 and 8,345.12

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Solution

The fourth proportional to 15,058.68, 20,781.76 and 8,345.12 is: 11,516.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,058.68 : 20,781.76 = 8,345.12 : x
  2. Step 2: Convert to fraction form
    15,058.68/20,781.76 = 8,345.12/x
  3. Step 3: Cross multiply
    15,058.68x = 20,781.76 × 8,345.12
  4. Step 4: Simplify right side
    15,058.68x = 173,426,281.01
  5. Step 5: Solve for x
    x = 173,426,281.01/15,058.68
  6. Step 6: Final answer
    x = 11,516.70

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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.