Home / 20,491.65-28,281.15-11,540.88

Finding the Fourth Proportional to 20,491.65, 28,281.15 and 11,540.88

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Solution

The fourth proportional to 20,491.65, 28,281.15 and 11,540.88 is: 15,927.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.65 : 28,281.15 = 11,540.88 : x
  2. Step 2: Convert to fraction form
    20,491.65/28,281.15 = 11,540.88/x
  3. Step 3: Cross multiply
    20,491.65x = 28,281.15 × 11,540.88
  4. Step 4: Simplify right side
    20,491.65x = 326,389,358.41
  5. Step 5: Solve for x
    x = 326,389,358.41/20,491.65
  6. Step 6: Final answer
    x = 15,927.92

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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.