Home / 39,040.47-53,876.28-21,135.86

Finding the Fourth Proportional to 39,040.47, 53,876.28 and 21,135.86

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Solution

The fourth proportional to 39,040.47, 53,876.28 and 21,135.86 is: 29,167.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,040.47 : 53,876.28 = 21,135.86 : x
  2. Step 2: Convert to fraction form
    39,040.47/53,876.28 = 21,135.86/x
  3. Step 3: Cross multiply
    39,040.47x = 53,876.28 × 21,135.86
  4. Step 4: Simplify right side
    39,040.47x = 1,138,721,511.40
  5. Step 5: Solve for x
    x = 1,138,721,511.40/39,040.47
  6. Step 6: Final answer
    x = 29,167.72

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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.