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Finding the Fourth Proportional to 14,918.65, 20,585.75 and 9,251.34

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Solution

The fourth proportional to 14,918.65, 20,585.75 and 9,251.34 is: 12,765.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,918.65 : 20,585.75 = 9,251.34 : x
  2. Step 2: Convert to fraction form
    14,918.65/20,585.75 = 9,251.34/x
  3. Step 3: Cross multiply
    14,918.65x = 20,585.75 × 9,251.34
  4. Step 4: Simplify right side
    14,918.65x = 190,445,648.95
  5. Step 5: Solve for x
    x = 190,445,648.95/14,918.65
  6. Step 6: Final answer
    x = 12,765.61

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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.