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Finding the Fourth Proportional to 15,707.66, 21,667.92 and 9,954.59

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Solution

The fourth proportional to 15,707.66, 21,667.92 and 9,954.59 is: 13,731.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,707.66 : 21,667.92 = 9,954.59 : x
  2. Step 2: Convert to fraction form
    15,707.66/21,667.92 = 9,954.59/x
  3. Step 3: Cross multiply
    15,707.66x = 21,667.92 × 9,954.59
  4. Step 4: Simplify right side
    15,707.66x = 215,695,259.75
  5. Step 5: Solve for x
    x = 215,695,259.75/15,707.66
  6. Step 6: Final answer
    x = 13,731.85

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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.