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Finding the Fourth Proportional to 7,245.70, 10,870.10 and 4,127.20

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Solution

The fourth proportional to 7,245.70, 10,870.10 and 4,127.20 is: 6,191.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,245.70 : 10,870.10 = 4,127.20 : x
  2. Step 2: Convert to fraction form
    7,245.70/10,870.10 = 4,127.20/x
  3. Step 3: Cross multiply
    7,245.70x = 10,870.10 × 4,127.20
  4. Step 4: Simplify right side
    7,245.70x = 44,863,076.72
  5. Step 5: Solve for x
    x = 44,863,076.72/7,245.70
  6. Step 6: Final answer
    x = 6,191.68

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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.