Home / 12,579.47-18,868.04-4,258.53

Finding the Fourth Proportional to 12,579.47, 18,868.04 and 4,258.53

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Solution

The fourth proportional to 12,579.47, 18,868.04 and 4,258.53 is: 6,387.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.47 : 18,868.04 = 4,258.53 : x
  2. Step 2: Convert to fraction form
    12,579.47/18,868.04 = 4,258.53/x
  3. Step 3: Cross multiply
    12,579.47x = 18,868.04 × 4,258.53
  4. Step 4: Simplify right side
    12,579.47x = 80,350,172.20
  5. Step 5: Solve for x
    x = 80,350,172.20/12,579.47
  6. Step 6: Final answer
    x = 6,387.41

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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.