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Finding the Fourth Proportional to 18,348.90, 25,321.47 and 9,965.40

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Solution

The fourth proportional to 18,348.90, 25,321.47 and 9,965.40 is: 13,752.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,348.90 : 25,321.47 = 9,965.40 : x
  2. Step 2: Convert to fraction form
    18,348.90/25,321.47 = 9,965.40/x
  3. Step 3: Cross multiply
    18,348.90x = 25,321.47 × 9,965.40
  4. Step 4: Simplify right side
    18,348.90x = 252,338,577.14
  5. Step 5: Solve for x
    x = 252,338,577.14/18,348.90
  6. Step 6: Final answer
    x = 13,752.25

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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.