Home / 40,728.61-61,102.46-12,647.21

Finding the Fourth Proportional to 40,728.61, 61,102.46 and 12,647.21

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Solution

The fourth proportional to 40,728.61, 61,102.46 and 12,647.21 is: 18,973.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728.61 : 61,102.46 = 12,647.21 : x
  2. Step 2: Convert to fraction form
    40,728.61/61,102.46 = 12,647.21/x
  3. Step 3: Cross multiply
    40,728.61x = 61,102.46 × 12,647.21
  4. Step 4: Simplify right side
    40,728.61x = 772,775,579.90
  5. Step 5: Solve for x
    x = 772,775,579.90/40,728.61
  6. Step 6: Final answer
    x = 18,973.78

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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.