Home / 4,989.20-7,478.53-1,867.15

Finding the Fourth Proportional to 4,989.20, 7,478.53 and 1,867.15

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Solution

The fourth proportional to 4,989.20, 7,478.53 and 1,867.15 is: 2,798.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.20 : 7,478.53 = 1,867.15 : x
  2. Step 2: Convert to fraction form
    4,989.20/7,478.53 = 1,867.15/x
  3. Step 3: Cross multiply
    4,989.20x = 7,478.53 × 1,867.15
  4. Step 4: Simplify right side
    4,989.20x = 13,963,541.97
  5. Step 5: Solve for x
    x = 13,963,541.97/4,989.20
  6. Step 6: Final answer
    x = 2,798.76

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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.