Home / 12,387.15-18,575.40-7,700.13

Finding the Fourth Proportional to 12,387.15, 18,575.40 and 7,700.13

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Solution

The fourth proportional to 12,387.15, 18,575.40 and 7,700.13 is: 11,546.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.15 : 18,575.40 = 7,700.13 : x
  2. Step 2: Convert to fraction form
    12,387.15/18,575.40 = 7,700.13/x
  3. Step 3: Cross multiply
    12,387.15x = 18,575.40 × 7,700.13
  4. Step 4: Simplify right side
    12,387.15x = 143,032,994.80
  5. Step 5: Solve for x
    x = 143,032,994.80/12,387.15
  6. Step 6: Final answer
    x = 11,546.88

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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.