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Finding the Fourth Proportional to 28,103.20, 42,187.20 and 17,022.40

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Solution

The fourth proportional to 28,103.20, 42,187.20 and 17,022.40 is: 25,553.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.20 : 42,187.20 = 17,022.40 : x
  2. Step 2: Convert to fraction form
    28,103.20/42,187.20 = 17,022.40/x
  3. Step 3: Cross multiply
    28,103.20x = 42,187.20 × 17,022.40
  4. Step 4: Simplify right side
    28,103.20x = 718,127,393.28
  5. Step 5: Solve for x
    x = 718,127,393.28/28,103.20
  6. Step 6: Final answer
    x = 25,553.23

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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.