Home / 10,128.90-15,193.34-5,195.78

Finding the Fourth Proportional to 10,128.90, 15,193.34 and 5,195.78

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Solution

The fourth proportional to 10,128.90, 15,193.34 and 5,195.78 is: 7,793.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.90 : 15,193.34 = 5,195.78 : x
  2. Step 2: Convert to fraction form
    10,128.90/15,193.34 = 5,195.78/x
  3. Step 3: Cross multiply
    10,128.90x = 15,193.34 × 5,195.78
  4. Step 4: Simplify right side
    10,128.90x = 78,941,252.11
  5. Step 5: Solve for x
    x = 78,941,252.11/10,128.90
  6. Step 6: Final answer
    x = 7,793.66

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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.