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Finding the Fourth Proportional to 7,019.72, 10,520.48 and 2,854.86

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Solution

The fourth proportional to 7,019.72, 10,520.48 and 2,854.86 is: 4,278.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,019.72 : 10,520.48 = 2,854.86 : x
  2. Step 2: Convert to fraction form
    7,019.72/10,520.48 = 2,854.86/x
  3. Step 3: Cross multiply
    7,019.72x = 10,520.48 × 2,854.86
  4. Step 4: Simplify right side
    7,019.72x = 30,034,497.53
  5. Step 5: Solve for x
    x = 30,034,497.53/7,019.72
  6. Step 6: Final answer
    x = 4,278.59

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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.