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Finding the Fourth Proportional to 15,614.48, 21,555 and 9,956.82

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Solution

The fourth proportional to 15,614.48, 21,555 and 9,956.82 is: 13,744.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,614.48 : 21,555 = 9,956.82 : x
  2. Step 2: Convert to fraction form
    15,614.48/21,555 = 9,956.82/x
  3. Step 3: Cross multiply
    15,614.48x = 21,555 × 9,956.82
  4. Step 4: Simplify right side
    15,614.48x = 214,619,255.10
  5. Step 5: Solve for x
    x = 214,619,255.10/15,614.48
  6. Step 6: Final answer
    x = 13,744.89

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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.