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Finding the Fourth Proportional to 9,903.52, 13,667.12 and 5,712.04

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Solution

The fourth proportional to 9,903.52, 13,667.12 and 5,712.04 is: 7,882.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,903.52 : 13,667.12 = 5,712.04 : x
  2. Step 2: Convert to fraction form
    9,903.52/13,667.12 = 5,712.04/x
  3. Step 3: Cross multiply
    9,903.52x = 13,667.12 × 5,712.04
  4. Step 4: Simplify right side
    9,903.52x = 78,067,136.12
  5. Step 5: Solve for x
    x = 78,067,136.12/9,903.52
  6. Step 6: Final answer
    x = 7,882.77

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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.