Home / 10,129.48-15,193.78-7,172.12

Finding the Fourth Proportional to 10,129.48, 15,193.78 and 7,172.12

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Solution

The fourth proportional to 10,129.48, 15,193.78 and 7,172.12 is: 10,757.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.48 : 15,193.78 = 7,172.12 : x
  2. Step 2: Convert to fraction form
    10,129.48/15,193.78 = 7,172.12/x
  3. Step 3: Cross multiply
    10,129.48x = 15,193.78 × 7,172.12
  4. Step 4: Simplify right side
    10,129.48x = 108,971,590.74
  5. Step 5: Solve for x
    x = 108,971,590.74/10,129.48
  6. Step 6: Final answer
    x = 10,757.87

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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.