Home / 27,996.15-38,634.69-15,420.90

Finding the Fourth Proportional to 27,996.15, 38,634.69 and 15,420.90

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Solution

The fourth proportional to 27,996.15, 38,634.69 and 15,420.90 is: 21,280.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,996.15 : 38,634.69 = 15,420.90 : x
  2. Step 2: Convert to fraction form
    27,996.15/38,634.69 = 15,420.90/x
  3. Step 3: Cross multiply
    27,996.15x = 38,634.69 × 15,420.90
  4. Step 4: Simplify right side
    27,996.15x = 595,781,817.71
  5. Step 5: Solve for x
    x = 595,781,817.71/27,996.15
  6. Step 6: Final answer
    x = 21,280.85

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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.