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Finding the Fourth Proportional to 21,061.71, 29,065.21 and 11,501.68

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Solution

The fourth proportional to 21,061.71, 29,065.21 and 11,501.68 is: 15,872.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.71 : 29,065.21 = 11,501.68 : x
  2. Step 2: Convert to fraction form
    21,061.71/29,065.21 = 11,501.68/x
  3. Step 3: Cross multiply
    21,061.71x = 29,065.21 × 11,501.68
  4. Step 4: Simplify right side
    21,061.71x = 334,298,744.55
  5. Step 5: Solve for x
    x = 334,298,744.55/21,061.71
  6. Step 6: Final answer
    x = 15,872.35

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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.