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Finding the Fourth Proportional to 18,253.21, 25,189.43 and 9,869.71

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Solution

The fourth proportional to 18,253.21, 25,189.43 and 9,869.71 is: 13,620.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,253.21 : 25,189.43 = 9,869.71 : x
  2. Step 2: Convert to fraction form
    18,253.21/25,189.43 = 9,869.71/x
  3. Step 3: Cross multiply
    18,253.21x = 25,189.43 × 9,869.71
  4. Step 4: Simplify right side
    18,253.21x = 248,612,267.89
  5. Step 5: Solve for x
    x = 248,612,267.89/18,253.21
  6. Step 6: Final answer
    x = 13,620.20

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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.