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Finding the Fourth Proportional to 18,348.71, 25,321.34 and 9,965.21

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Solution

The fourth proportional to 18,348.71, 25,321.34 and 9,965.21 is: 13,752.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.71 : 25,321.34 = 9,965.21 : x
  2. Step 2: Convert to fraction form
    18,348.71/25,321.34 = 9,965.21/x
  3. Step 3: Cross multiply
    18,348.71x = 25,321.34 × 9,965.21
  4. Step 4: Simplify right side
    18,348.71x = 252,332,368.89
  5. Step 5: Solve for x
    x = 252,332,368.89/18,348.71
  6. Step 6: Final answer
    x = 13,752.05

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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.