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Finding the Fourth Proportional to 18,362.13, 25,339.94 and 9,978.63

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Solution

The fourth proportional to 18,362.13, 25,339.94 and 9,978.63 is: 13,770.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.13 : 25,339.94 = 9,978.63 : x
  2. Step 2: Convert to fraction form
    18,362.13/25,339.94 = 9,978.63/x
  3. Step 3: Cross multiply
    18,362.13x = 25,339.94 × 9,978.63
  4. Step 4: Simplify right side
    18,362.13x = 252,857,885.48
  5. Step 5: Solve for x
    x = 252,857,885.48/18,362.13
  6. Step 6: Final answer
    x = 13,770.62

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1.5x scale

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.