Home / 12,540.30-18,808.71-8,780.68

Finding the Fourth Proportional to 12,540.30, 18,808.71 and 8,780.68

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Solution

The fourth proportional to 12,540.30, 18,808.71 and 8,780.68 is: 13,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.30 : 18,808.71 = 8,780.68 : x
  2. Step 2: Convert to fraction form
    12,540.30/18,808.71 = 8,780.68/x
  3. Step 3: Cross multiply
    12,540.30x = 18,808.71 × 8,780.68
  4. Step 4: Simplify right side
    12,540.30x = 165,153,263.72
  5. Step 5: Solve for x
    x = 165,153,263.72/12,540.30
  6. Step 6: Final answer
    x = 13,169.80

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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.