Home / 15,138.14-20,892.48-9,169.66

Finding the Fourth Proportional to 15,138.14, 20,892.48 and 9,169.66

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Solution

The fourth proportional to 15,138.14, 20,892.48 and 9,169.66 is: 12,655.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.14 : 20,892.48 = 9,169.66 : x
  2. Step 2: Convert to fraction form
    15,138.14/20,892.48 = 9,169.66/x
  3. Step 3: Cross multiply
    15,138.14x = 20,892.48 × 9,169.66
  4. Step 4: Simplify right side
    15,138.14x = 191,576,938.16
  5. Step 5: Solve for x
    x = 191,576,938.16/15,138.14
  6. Step 6: Final answer
    x = 12,655.25

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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.