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Finding the Fourth Proportional to 28,116.80, 42,174.80 and 7,340.30

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Solution

The fourth proportional to 28,116.80, 42,174.80 and 7,340.30 is: 11,010.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,116.80 : 42,174.80 = 7,340.30 : x
  2. Step 2: Convert to fraction form
    28,116.80/42,174.80 = 7,340.30/x
  3. Step 3: Cross multiply
    28,116.80x = 42,174.80 × 7,340.30
  4. Step 4: Simplify right side
    28,116.80x = 309,575,684.44
  5. Step 5: Solve for x
    x = 309,575,684.44/28,116.80
  6. Step 6: Final answer
    x = 11,010.35

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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.