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Finding the Fourth Proportional to 18,369.60, 25,350.06 and 9,986.10

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Solution

The fourth proportional to 18,369.60, 25,350.06 and 9,986.10 is: 13,780.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,369.60 : 25,350.06 = 9,986.10 : x
  2. Step 2: Convert to fraction form
    18,369.60/25,350.06 = 9,986.10/x
  3. Step 3: Cross multiply
    18,369.60x = 25,350.06 × 9,986.10
  4. Step 4: Simplify right side
    18,369.60x = 253,148,234.17
  5. Step 5: Solve for x
    x = 253,148,234.17/18,369.60
  6. Step 6: Final answer
    x = 13,780.82

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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.