Home / 10,255.40-15,377.61-5,312.78

Finding the Fourth Proportional to 10,255.40, 15,377.61 and 5,312.78

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Solution

The fourth proportional to 10,255.40, 15,377.61 and 5,312.78 is: 7,966.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,255.40 : 15,377.61 = 5,312.78 : x
  2. Step 2: Convert to fraction form
    10,255.40/15,377.61 = 5,312.78/x
  3. Step 3: Cross multiply
    10,255.40x = 15,377.61 × 5,312.78
  4. Step 4: Simplify right side
    10,255.40x = 81,697,781.97
  5. Step 5: Solve for x
    x = 81,697,781.97/10,255.40
  6. Step 6: Final answer
    x = 7,966.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.