Home / 10,122.90-15,151.95-5,431.38

Finding the Fourth Proportional to 10,122.90, 15,151.95 and 5,431.38

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Solution

The fourth proportional to 10,122.90, 15,151.95 and 5,431.38 is: 8,129.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,122.90 : 15,151.95 = 5,431.38 : x
  2. Step 2: Convert to fraction form
    10,122.90/15,151.95 = 5,431.38/x
  3. Step 3: Cross multiply
    10,122.90x = 15,151.95 × 5,431.38
  4. Step 4: Simplify right side
    10,122.90x = 82,295,998.19
  5. Step 5: Solve for x
    x = 82,295,998.19/10,122.90
  6. Step 6: Final answer
    x = 8,129.69

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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.