Home / 9,921.21-13,691.45-5,445.38

Finding the Fourth Proportional to 9,921.21, 13,691.45 and 5,445.38

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Solution

The fourth proportional to 9,921.21, 13,691.45 and 5,445.38 is: 7,514.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.21 : 13,691.45 = 5,445.38 : x
  2. Step 2: Convert to fraction form
    9,921.21/13,691.45 = 5,445.38/x
  3. Step 3: Cross multiply
    9,921.21x = 13,691.45 × 5,445.38
  4. Step 4: Simplify right side
    9,921.21x = 74,555,155.00
  5. Step 5: Solve for x
    x = 74,555,155.00/9,921.21
  6. Step 6: Final answer
    x = 7,514.72

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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.