Home / 8,538.60-12,815.10-4,159.80

Finding the Fourth Proportional to 8,538.60, 12,815.10 and 4,159.80

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Solution

The fourth proportional to 8,538.60, 12,815.10 and 4,159.80 is: 6,243.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.60 : 12,815.10 = 4,159.80 : x
  2. Step 2: Convert to fraction form
    8,538.60/12,815.10 = 4,159.80/x
  3. Step 3: Cross multiply
    8,538.60x = 12,815.10 × 4,159.80
  4. Step 4: Simplify right side
    8,538.60x = 53,308,252.98
  5. Step 5: Solve for x
    x = 53,308,252.98/8,538.60
  6. Step 6: Final answer
    x = 6,243.21

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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.