Home / 28,269.20-42,403.80-18,419.60

Finding the Fourth Proportional to 28,269.20, 42,403.80 and 18,419.60

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Solution

The fourth proportional to 28,269.20, 42,403.80 and 18,419.60 is: 27,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,269.20 : 42,403.80 = 18,419.60 : x
  2. Step 2: Convert to fraction form
    28,269.20/42,403.80 = 18,419.60/x
  3. Step 3: Cross multiply
    28,269.20x = 42,403.80 × 18,419.60
  4. Step 4: Simplify right side
    28,269.20x = 781,061,034.48
  5. Step 5: Solve for x
    x = 781,061,034.48/28,269.20
  6. Step 6: Final answer
    x = 27,629.40

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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.