Home / 12,615.12-18,886.98-6,678.52

Finding the Fourth Proportional to 12,615.12, 18,886.98 and 6,678.52

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Solution

The fourth proportional to 12,615.12, 18,886.98 and 6,678.52 is: 9,998.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.12 : 18,886.98 = 6,678.52 : x
  2. Step 2: Convert to fraction form
    12,615.12/18,886.98 = 6,678.52/x
  3. Step 3: Cross multiply
    12,615.12x = 18,886.98 × 6,678.52
  4. Step 4: Simplify right side
    12,615.12x = 126,137,073.67
  5. Step 5: Solve for x
    x = 126,137,073.67/12,615.12
  6. Step 6: Final answer
    x = 9,998.88

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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.