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Finding the Fourth Proportional to 39,987, 55,182.06 and 22,323

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Solution

The fourth proportional to 39,987, 55,182.06 and 22,323 is: 30,805.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,987 : 55,182.06 = 22,323 : x
  2. Step 2: Convert to fraction form
    39,987/55,182.06 = 22,323/x
  3. Step 3: Cross multiply
    39,987x = 55,182.06 × 22,323
  4. Step 4: Simplify right side
    39,987x = 1,231,829,125.38
  5. Step 5: Solve for x
    x = 1,231,829,125.38/39,987
  6. Step 6: Final answer
    x = 30,805.74

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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.