Home / 15,126.38-20,876.26-9,157.90

Finding the Fourth Proportional to 15,126.38, 20,876.26 and 9,157.90

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Solution

The fourth proportional to 15,126.38, 20,876.26 and 9,157.90 is: 12,639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.38 : 20,876.26 = 9,157.90 : x
  2. Step 2: Convert to fraction form
    15,126.38/20,876.26 = 9,157.90/x
  3. Step 3: Cross multiply
    15,126.38x = 20,876.26 × 9,157.90
  4. Step 4: Simplify right side
    15,126.38x = 191,182,701.45
  5. Step 5: Solve for x
    x = 191,182,701.45/15,126.38
  6. Step 6: Final answer
    x = 12,639.03

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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.