Home / 20,491.65-28,278.21-11,540.04

Finding the Fourth Proportional to 20,491.65, 28,278.21 and 11,540.04

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Solution

The fourth proportional to 20,491.65, 28,278.21 and 11,540.04 is: 15,925.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.65 : 28,278.21 = 11,540.04 : x
  2. Step 2: Convert to fraction form
    20,491.65/28,278.21 = 11,540.04/x
  3. Step 3: Cross multiply
    20,491.65x = 28,278.21 × 11,540.04
  4. Step 4: Simplify right side
    20,491.65x = 326,331,674.53
  5. Step 5: Solve for x
    x = 326,331,674.53/20,491.65
  6. Step 6: Final answer
    x = 15,925.10

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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.