Home / 12,631.47-17,421.20-11,115.77

Finding the Fourth Proportional to 12,631.47, 17,421.20 and 11,115.77

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Solution

The fourth proportional to 12,631.47, 17,421.20 and 11,115.77 is: 15,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.47 : 17,421.20 = 11,115.77 : x
  2. Step 2: Convert to fraction form
    12,631.47/17,421.20 = 11,115.77/x
  3. Step 3: Cross multiply
    12,631.47x = 17,421.20 × 11,115.77
  4. Step 4: Simplify right side
    12,631.47x = 193,649,909.64
  5. Step 5: Solve for x
    x = 193,649,909.64/12,631.47
  6. Step 6: Final answer
    x = 15,330.75

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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.