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Finding the Fourth Proportional to 28,203.20, 42,304.80 and 25,284.80

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Solution

The fourth proportional to 28,203.20, 42,304.80 and 25,284.80 is: 37,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.20 : 42,304.80 = 25,284.80 : x
  2. Step 2: Convert to fraction form
    28,203.20/42,304.80 = 25,284.80/x
  3. Step 3: Cross multiply
    28,203.20x = 42,304.80 × 25,284.80
  4. Step 4: Simplify right side
    28,203.20x = 1,069,668,407.04
  5. Step 5: Solve for x
    x = 1,069,668,407.04/28,203.20
  6. Step 6: Final answer
    x = 37,927.20

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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.