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Finding the Fourth Proportional to 21,655.66, 29,857 and 17,760.71

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Solution

The fourth proportional to 21,655.66, 29,857 and 17,760.71 is: 24,486.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.66 : 29,857 = 17,760.71 : x
  2. Step 2: Convert to fraction form
    21,655.66/29,857 = 17,760.71/x
  3. Step 3: Cross multiply
    21,655.66x = 29,857 × 17,760.71
  4. Step 4: Simplify right side
    21,655.66x = 530,281,518.47
  5. Step 5: Solve for x
    x = 530,281,518.47/21,655.66
  6. Step 6: Final answer
    x = 24,486.97

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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.