Home / 8,968.40-13,456.56-3,129.20

Finding the Fourth Proportional to 8,968.40, 13,456.56 and 3,129.20

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Solution

The fourth proportional to 8,968.40, 13,456.56 and 3,129.20 is: 4,695.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,968.40 : 13,456.56 = 3,129.20 : x
  2. Step 2: Convert to fraction form
    8,968.40/13,456.56 = 3,129.20/x
  3. Step 3: Cross multiply
    8,968.40x = 13,456.56 × 3,129.20
  4. Step 4: Simplify right side
    8,968.40x = 42,108,267.55
  5. Step 5: Solve for x
    x = 42,108,267.55/8,968.40
  6. Step 6: Final answer
    x = 4,695.18

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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.