Home / 13,517.01-18,666.30-12,780.72

Finding the Fourth Proportional to 13,517.01, 18,666.30 and 12,780.72

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Solution

The fourth proportional to 13,517.01, 18,666.30 and 12,780.72 is: 17,649.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.01 : 18,666.30 = 12,780.72 : x
  2. Step 2: Convert to fraction form
    13,517.01/18,666.30 = 12,780.72/x
  3. Step 3: Cross multiply
    13,517.01x = 18,666.30 × 12,780.72
  4. Step 4: Simplify right side
    13,517.01x = 238,568,753.74
  5. Step 5: Solve for x
    x = 238,568,753.74/13,517.01
  6. Step 6: Final answer
    x = 17,649.52

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1.5x scale

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.