Home / 8,619.60-12,935.80-3,429.20

Finding the Fourth Proportional to 8,619.60, 12,935.80 and 3,429.20

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Solution

The fourth proportional to 8,619.60, 12,935.80 and 3,429.20 is: 5,146.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.60 : 12,935.80 = 3,429.20 : x
  2. Step 2: Convert to fraction form
    8,619.60/12,935.80 = 3,429.20/x
  3. Step 3: Cross multiply
    8,619.60x = 12,935.80 × 3,429.20
  4. Step 4: Simplify right side
    8,619.60x = 44,359,445.36
  5. Step 5: Solve for x
    x = 44,359,445.36/8,619.60
  6. Step 6: Final answer
    x = 5,146.35

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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.