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Finding the Fourth Proportional to 18,346.32, 25,309.80 and 10,890

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Solution

The fourth proportional to 18,346.32, 25,309.80 and 10,890 is: 15,023.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,346.32 : 25,309.80 = 10,890 : x
  2. Step 2: Convert to fraction form
    18,346.32/25,309.80 = 10,890/x
  3. Step 3: Cross multiply
    18,346.32x = 25,309.80 × 10,890
  4. Step 4: Simplify right side
    18,346.32x = 275,623,722
  5. Step 5: Solve for x
    x = 275,623,722/18,346.32
  6. Step 6: Final answer
    x = 15,023.38

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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.