Home / 15,126.40-20,874.94-8,320.71

Finding the Fourth Proportional to 15,126.40, 20,874.94 and 8,320.71

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Solution

The fourth proportional to 15,126.40, 20,874.94 and 8,320.71 is: 11,482.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.40 : 20,874.94 = 8,320.71 : x
  2. Step 2: Convert to fraction form
    15,126.40/20,874.94 = 8,320.71/x
  3. Step 3: Cross multiply
    15,126.40x = 20,874.94 × 8,320.71
  4. Step 4: Simplify right side
    15,126.40x = 173,694,373.53
  5. Step 5: Solve for x
    x = 173,694,373.53/15,126.40
  6. Step 6: Final answer
    x = 11,482.87

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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.