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Finding the Fourth Proportional to 18,304, 25,259.55 and 9,920.50

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Solution

The fourth proportional to 18,304, 25,259.55 and 9,920.50 is: 13,690.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,304 : 25,259.55 = 9,920.50 : x
  2. Step 2: Convert to fraction form
    18,304/25,259.55 = 9,920.50/x
  3. Step 3: Cross multiply
    18,304x = 25,259.55 × 9,920.50
  4. Step 4: Simplify right side
    18,304x = 250,587,365.78
  5. Step 5: Solve for x
    x = 250,587,365.78/18,304
  6. Step 6: Final answer
    x = 13,690.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.