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Finding the Fourth Proportional to 12,888.60, 17,772.21 and 11,195.04

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Solution

The fourth proportional to 12,888.60, 17,772.21 and 11,195.04 is: 15,436.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,888.60 : 17,772.21 = 11,195.04 : x
  2. Step 2: Convert to fraction form
    12,888.60/17,772.21 = 11,195.04/x
  3. Step 3: Cross multiply
    12,888.60x = 17,772.21 × 11,195.04
  4. Step 4: Simplify right side
    12,888.60x = 198,960,601.84
  5. Step 5: Solve for x
    x = 198,960,601.84/12,888.60
  6. Step 6: Final answer
    x = 15,436.94

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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.