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Finding the Fourth Proportional to 11,935.80, 17,909.64 and 9,031.92

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Solution

The fourth proportional to 11,935.80, 17,909.64 and 9,031.92 is: 13,552.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,935.80 : 17,909.64 = 9,031.92 : x
  2. Step 2: Convert to fraction form
    11,935.80/17,909.64 = 9,031.92/x
  3. Step 3: Cross multiply
    11,935.80x = 17,909.64 × 9,031.92
  4. Step 4: Simplify right side
    11,935.80x = 161,758,435.71
  5. Step 5: Solve for x
    x = 161,758,435.71/11,935.80
  6. Step 6: Final answer
    x = 13,552.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.