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Finding the Fourth Proportional to 28,121.20, 42,214.20 and 17,040.40

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Solution

The fourth proportional to 28,121.20, 42,214.20 and 17,040.40 is: 25,580.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.20 : 42,214.20 = 17,040.40 : x
  2. Step 2: Convert to fraction form
    28,121.20/42,214.20 = 17,040.40/x
  3. Step 3: Cross multiply
    28,121.20x = 42,214.20 × 17,040.40
  4. Step 4: Simplify right side
    28,121.20x = 719,346,853.68
  5. Step 5: Solve for x
    x = 719,346,853.68/28,121.20
  6. Step 6: Final answer
    x = 25,580.23

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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.