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Finding the Fourth Proportional to 21,059.87, 29,062.42 and 11,499.71

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Solution

The fourth proportional to 21,059.87, 29,062.42 and 11,499.71 is: 15,869.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,059.87 : 29,062.42 = 11,499.71 : x
  2. Step 2: Convert to fraction form
    21,059.87/29,062.42 = 11,499.71/x
  3. Step 3: Cross multiply
    21,059.87x = 29,062.42 × 11,499.71
  4. Step 4: Simplify right side
    21,059.87x = 334,209,292.52
  5. Step 5: Solve for x
    x = 334,209,292.52/21,059.87
  6. Step 6: Final answer
    x = 15,869.49

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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.