Home / 28,686.78-43,032.60-9,961.20

Finding the Fourth Proportional to 28,686.78, 43,032.60 and 9,961.20

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Solution

The fourth proportional to 28,686.78, 43,032.60 and 9,961.20 is: 14,942.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.78 : 43,032.60 = 9,961.20 : x
  2. Step 2: Convert to fraction form
    28,686.78/43,032.60 = 9,961.20/x
  3. Step 3: Cross multiply
    28,686.78x = 43,032.60 × 9,961.20
  4. Step 4: Simplify right side
    28,686.78x = 428,656,335.12
  5. Step 5: Solve for x
    x = 428,656,335.12/28,686.78
  6. Step 6: Final answer
    x = 14,942.64

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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.