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Finding the Fourth Proportional to 28,367.80, 42,551.08 and 7,591.30

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Solution

The fourth proportional to 28,367.80, 42,551.08 and 7,591.30 is: 11,386.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,367.80 : 42,551.08 = 7,591.30 : x
  2. Step 2: Convert to fraction form
    28,367.80/42,551.08 = 7,591.30/x
  3. Step 3: Cross multiply
    28,367.80x = 42,551.08 × 7,591.30
  4. Step 4: Simplify right side
    28,367.80x = 323,018,013.60
  5. Step 5: Solve for x
    x = 323,018,013.60/28,367.80
  6. Step 6: Final answer
    x = 11,386.78

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1.5x scale

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.