Home / 13,614.24-20,420.88-4,380

Finding the Fourth Proportional to 13,614.24, 20,420.88 and 4,380

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Solution

The fourth proportional to 13,614.24, 20,420.88 and 4,380 is: 6,569.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,614.24 : 20,420.88 = 4,380 : x
  2. Step 2: Convert to fraction form
    13,614.24/20,420.88 = 4,380/x
  3. Step 3: Cross multiply
    13,614.24x = 20,420.88 × 4,380
  4. Step 4: Simplify right side
    13,614.24x = 89,443,454.40
  5. Step 5: Solve for x
    x = 89,443,454.40/13,614.24
  6. Step 6: Final answer
    x = 6,569.85

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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.