Home / 6,387.60-8,812.20-4,615.28

Finding the Fourth Proportional to 6,387.60, 8,812.20 and 4,615.28

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Solution

The fourth proportional to 6,387.60, 8,812.20 and 4,615.28 is: 6,367.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,387.60 : 8,812.20 = 4,615.28 : x
  2. Step 2: Convert to fraction form
    6,387.60/8,812.20 = 4,615.28/x
  3. Step 3: Cross multiply
    6,387.60x = 8,812.20 × 4,615.28
  4. Step 4: Simplify right side
    6,387.60x = 40,670,770.42
  5. Step 5: Solve for x
    x = 40,670,770.42/6,387.60
  6. Step 6: Final answer
    x = 6,367.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.