Home / 13,898.40-20,829.12-5,125.20

Finding the Fourth Proportional to 13,898.40, 20,829.12 and 5,125.20

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Solution

The fourth proportional to 13,898.40, 20,829.12 and 5,125.20 is: 7,680.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,898.40 : 20,829.12 = 5,125.20 : x
  2. Step 2: Convert to fraction form
    13,898.40/20,829.12 = 5,125.20/x
  3. Step 3: Cross multiply
    13,898.40x = 20,829.12 × 5,125.20
  4. Step 4: Simplify right side
    13,898.40x = 106,753,405.82
  5. Step 5: Solve for x
    x = 106,753,405.82/13,898.40
  6. Step 6: Final answer
    x = 7,680.99

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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.