Home / 15,158.38-20,911.32-11,778.07

Finding the Fourth Proportional to 15,158.38, 20,911.32 and 11,778.07

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Solution

The fourth proportional to 15,158.38, 20,911.32 and 11,778.07 is: 16,248.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.38 : 20,911.32 = 11,778.07 : x
  2. Step 2: Convert to fraction form
    15,158.38/20,911.32 = 11,778.07/x
  3. Step 3: Cross multiply
    15,158.38x = 20,911.32 × 11,778.07
  4. Step 4: Simplify right side
    15,158.38x = 246,294,938.47
  5. Step 5: Solve for x
    x = 246,294,938.47/15,158.38
  6. Step 6: Final answer
    x = 16,248.11

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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.