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Finding the Fourth Proportional to 12,918.65, 17,835 and 8,446.92

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Solution

The fourth proportional to 12,918.65, 17,835 and 8,446.92 is: 11,661.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.65 : 17,835 = 8,446.92 : x
  2. Step 2: Convert to fraction form
    12,918.65/17,835 = 8,446.92/x
  3. Step 3: Cross multiply
    12,918.65x = 17,835 × 8,446.92
  4. Step 4: Simplify right side
    12,918.65x = 150,650,818.20
  5. Step 5: Solve for x
    x = 150,650,818.20/12,918.65
  6. Step 6: Final answer
    x = 11,661.50

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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.