Home / 10,122.53-15,151.37-5,431.01

Finding the Fourth Proportional to 10,122.53, 15,151.37 and 5,431.01

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Solution

The fourth proportional to 10,122.53, 15,151.37 and 5,431.01 is: 8,129.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,122.53 : 15,151.37 = 5,431.01 : x
  2. Step 2: Convert to fraction form
    10,122.53/15,151.37 = 5,431.01/x
  3. Step 3: Cross multiply
    10,122.53x = 15,151.37 × 5,431.01
  4. Step 4: Simplify right side
    10,122.53x = 82,287,139.07
  5. Step 5: Solve for x
    x = 82,287,139.07/10,122.53
  6. Step 6: Final answer
    x = 8,129.11

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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.