Home / 28,218.40-42,327.60-17,720.80

Finding the Fourth Proportional to 28,218.40, 42,327.60 and 17,720.80

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Solution

The fourth proportional to 28,218.40, 42,327.60 and 17,720.80 is: 26,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.40 : 42,327.60 = 17,720.80 : x
  2. Step 2: Convert to fraction form
    28,218.40/42,327.60 = 17,720.80/x
  3. Step 3: Cross multiply
    28,218.40x = 42,327.60 × 17,720.80
  4. Step 4: Simplify right side
    28,218.40x = 750,078,934.08
  5. Step 5: Solve for x
    x = 750,078,934.08/28,218.40
  6. Step 6: Final answer
    x = 26,581.20

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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.