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Finding the Fourth Proportional to 18,278.16, 25,223.88 and 9,894.64

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Solution

The fourth proportional to 18,278.16, 25,223.88 and 9,894.64 is: 13,654.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.16 : 25,223.88 = 9,894.64 : x
  2. Step 2: Convert to fraction form
    18,278.16/25,223.88 = 9,894.64/x
  3. Step 3: Cross multiply
    18,278.16x = 25,223.88 × 9,894.64
  4. Step 4: Simplify right side
    18,278.16x = 249,581,212.00
  5. Step 5: Solve for x
    x = 249,581,212.00/18,278.16
  6. Step 6: Final answer
    x = 13,654.61

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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.