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Finding the Fourth Proportional to 15,560.71, 21,473.03 and 9,520.99

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Solution

The fourth proportional to 15,560.71, 21,473.03 and 9,520.99 is: 13,138.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,560.71 : 21,473.03 = 9,520.99 : x
  2. Step 2: Convert to fraction form
    15,560.71/21,473.03 = 9,520.99/x
  3. Step 3: Cross multiply
    15,560.71x = 21,473.03 × 9,520.99
  4. Step 4: Simplify right side
    15,560.71x = 204,444,474.02
  5. Step 5: Solve for x
    x = 204,444,474.02/15,560.71
  6. Step 6: Final answer
    x = 13,138.51

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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.