Home / 40,728.60-61,102.46-12,647.20

Finding the Fourth Proportional to 40,728.60, 61,102.46 and 12,647.20

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Solution

The fourth proportional to 40,728.60, 61,102.46 and 12,647.20 is: 18,973.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728.60 : 61,102.46 = 12,647.20 : x
  2. Step 2: Convert to fraction form
    40,728.60/61,102.46 = 12,647.20/x
  3. Step 3: Cross multiply
    40,728.60x = 61,102.46 × 12,647.20
  4. Step 4: Simplify right side
    40,728.60x = 772,775,032.11
  5. Step 5: Solve for x
    x = 772,775,032.11/40,728.60
  6. Step 6: Final answer
    x = 18,973.77

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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.