Home / 28,531.38-42,801.16-8,811.60

Finding the Fourth Proportional to 28,531.38, 42,801.16 and 8,811.60

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Solution

The fourth proportional to 28,531.38, 42,801.16 and 8,811.60 is: 13,218.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.38 : 42,801.16 = 8,811.60 : x
  2. Step 2: Convert to fraction form
    28,531.38/42,801.16 = 8,811.60/x
  3. Step 3: Cross multiply
    28,531.38x = 42,801.16 × 8,811.60
  4. Step 4: Simplify right side
    28,531.38x = 377,146,701.46
  5. Step 5: Solve for x
    x = 377,146,701.46/28,531.38
  6. Step 6: Final answer
    x = 13,218.66

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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.