Home / 21,030.13-31,545.19-5,447.75

Finding the Fourth Proportional to 21,030.13, 31,545.19 and 5,447.75

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Solution

The fourth proportional to 21,030.13, 31,545.19 and 5,447.75 is: 8,171.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.13 : 31,545.19 = 5,447.75 : x
  2. Step 2: Convert to fraction form
    21,030.13/31,545.19 = 5,447.75/x
  3. Step 3: Cross multiply
    21,030.13x = 31,545.19 × 5,447.75
  4. Step 4: Simplify right side
    21,030.13x = 171,850,308.82
  5. Step 5: Solve for x
    x = 171,850,308.82/21,030.13
  6. Step 6: Final answer
    x = 8,171.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.