Home / 20,862.40-31,293.60-18,270.40

Finding the Fourth Proportional to 20,862.40, 31,293.60 and 18,270.40

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Solution

The fourth proportional to 20,862.40, 31,293.60 and 18,270.40 is: 27,405.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.40 : 31,293.60 = 18,270.40 : x
  2. Step 2: Convert to fraction form
    20,862.40/31,293.60 = 18,270.40/x
  3. Step 3: Cross multiply
    20,862.40x = 31,293.60 × 18,270.40
  4. Step 4: Simplify right side
    20,862.40x = 571,746,589.44
  5. Step 5: Solve for x
    x = 571,746,589.44/20,862.40
  6. Step 6: Final answer
    x = 27,405.60

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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.