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Finding the Fourth Proportional to 21,562.76, 29,764.64 and 12,613.07

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Solution

The fourth proportional to 21,562.76, 29,764.64 and 12,613.07 is: 17,410.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,562.76 : 29,764.64 = 12,613.07 : x
  2. Step 2: Convert to fraction form
    21,562.76/29,764.64 = 12,613.07/x
  3. Step 3: Cross multiply
    21,562.76x = 29,764.64 × 12,613.07
  4. Step 4: Simplify right side
    21,562.76x = 375,423,593.79
  5. Step 5: Solve for x
    x = 375,423,593.79/21,562.76
  6. Step 6: Final answer
    x = 17,410.74

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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.