Home / 39,815.10-59,731.28-12,112.38

Finding the Fourth Proportional to 39,815.10, 59,731.28 and 12,112.38

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Solution

The fourth proportional to 39,815.10, 59,731.28 and 12,112.38 is: 18,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,815.10 : 59,731.28 = 12,112.38 : x
  2. Step 2: Convert to fraction form
    39,815.10/59,731.28 = 12,112.38/x
  3. Step 3: Cross multiply
    39,815.10x = 59,731.28 × 12,112.38
  4. Step 4: Simplify right side
    39,815.10x = 723,487,961.25
  5. Step 5: Solve for x
    x = 723,487,961.25/39,815.10
  6. Step 6: Final answer
    x = 18,171.20

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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.