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Finding the Fourth Proportional to 5,114.80, 7,672.20 and 5,082.40

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Solution

The fourth proportional to 5,114.80, 7,672.20 and 5,082.40 is: 7,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,114.80 : 7,672.20 = 5,082.40 : x
  2. Step 2: Convert to fraction form
    5,114.80/7,672.20 = 5,082.40/x
  3. Step 3: Cross multiply
    5,114.80x = 7,672.20 × 5,082.40
  4. Step 4: Simplify right side
    5,114.80x = 38,993,189.28
  5. Step 5: Solve for x
    x = 38,993,189.28/5,114.80
  6. Step 6: Final answer
    x = 7,623.60

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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.