Home / 10,387.30-15,578.07-2,989.75

Finding the Fourth Proportional to 10,387.30, 15,578.07 and 2,989.75

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Solution

The fourth proportional to 10,387.30, 15,578.07 and 2,989.75 is: 4,483.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,387.30 : 15,578.07 = 2,989.75 : x
  2. Step 2: Convert to fraction form
    10,387.30/15,578.07 = 2,989.75/x
  3. Step 3: Cross multiply
    10,387.30x = 15,578.07 × 2,989.75
  4. Step 4: Simplify right side
    10,387.30x = 46,574,534.78
  5. Step 5: Solve for x
    x = 46,574,534.78/10,387.30
  6. Step 6: Final answer
    x = 4,483.80

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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.