Home / 10,077.50-15,083.90-5,385.78

Finding the Fourth Proportional to 10,077.50, 15,083.90 and 5,385.78

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Solution

The fourth proportional to 10,077.50, 15,083.90 and 5,385.78 is: 8,061.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,077.50 : 15,083.90 = 5,385.78 : x
  2. Step 2: Convert to fraction form
    10,077.50/15,083.90 = 5,385.78/x
  3. Step 3: Cross multiply
    10,077.50x = 15,083.90 × 5,385.78
  4. Step 4: Simplify right side
    10,077.50x = 81,238,566.94
  5. Step 5: Solve for x
    x = 81,238,566.94/10,077.50
  6. Step 6: Final answer
    x = 8,061.38

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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.