Home / 12,740.80-19,115.20-6,167.20

Finding the Fourth Proportional to 12,740.80, 19,115.20 and 6,167.20

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Solution

The fourth proportional to 12,740.80, 19,115.20 and 6,167.20 is: 9,252.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,740.80 : 19,115.20 = 6,167.20 : x
  2. Step 2: Convert to fraction form
    12,740.80/19,115.20 = 6,167.20/x
  3. Step 3: Cross multiply
    12,740.80x = 19,115.20 × 6,167.20
  4. Step 4: Simplify right side
    12,740.80x = 117,887,261.44
  5. Step 5: Solve for x
    x = 117,887,261.44/12,740.80
  6. Step 6: Final answer
    x = 9,252.74

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1.5x scale

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.