Home / 20,515.91-28,313.28-11,442.29

Finding the Fourth Proportional to 20,515.91, 28,313.28 and 11,442.29

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Solution

The fourth proportional to 20,515.91, 28,313.28 and 11,442.29 is: 15,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.91 : 28,313.28 = 11,442.29 : x
  2. Step 2: Convert to fraction form
    20,515.91/28,313.28 = 11,442.29/x
  3. Step 3: Cross multiply
    20,515.91x = 28,313.28 × 11,442.29
  4. Step 4: Simplify right side
    20,515.91x = 323,968,619.04
  5. Step 5: Solve for x
    x = 323,968,619.04/20,515.91
  6. Step 6: Final answer
    x = 15,791.10

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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.