Home / 10,387.64-15,575.09-5,122.44

Finding the Fourth Proportional to 10,387.64, 15,575.09 and 5,122.44

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Solution

The fourth proportional to 10,387.64, 15,575.09 and 5,122.44 is: 7,680.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.64 : 15,575.09 = 5,122.44 : x
  2. Step 2: Convert to fraction form
    10,387.64/15,575.09 = 5,122.44/x
  3. Step 3: Cross multiply
    10,387.64x = 15,575.09 × 5,122.44
  4. Step 4: Simplify right side
    10,387.64x = 79,782,438.41
  5. Step 5: Solve for x
    x = 79,782,438.41/10,387.64
  6. Step 6: Final answer
    x = 7,680.51

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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.