Home / 12,909.12-17,814.24-7,320

Finding the Fourth Proportional to 12,909.12, 17,814.24 and 7,320

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Solution

The fourth proportional to 12,909.12, 17,814.24 and 7,320 is: 10,101.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.12 : 17,814.24 = 7,320 : x
  2. Step 2: Convert to fraction form
    12,909.12/17,814.24 = 7,320/x
  3. Step 3: Cross multiply
    12,909.12x = 17,814.24 × 7,320
  4. Step 4: Simplify right side
    12,909.12x = 130,400,236.80
  5. Step 5: Solve for x
    x = 130,400,236.80/12,909.12
  6. Step 6: Final answer
    x = 10,101.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.