Home / 10,147.75-15,204.21-9,120.57

Finding the Fourth Proportional to 10,147.75, 15,204.21 and 9,120.57

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Solution

The fourth proportional to 10,147.75, 15,204.21 and 9,120.57 is: 13,665.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,147.75 : 15,204.21 = 9,120.57 : x
  2. Step 2: Convert to fraction form
    10,147.75/15,204.21 = 9,120.57/x
  3. Step 3: Cross multiply
    10,147.75x = 15,204.21 × 9,120.57
  4. Step 4: Simplify right side
    10,147.75x = 138,670,970.38
  5. Step 5: Solve for x
    x = 138,670,970.38/10,147.75
  6. Step 6: Final answer
    x = 13,665.20

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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.