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Finding the Fourth Proportional to 15,569.62, 21,486.67 and 8,855.87

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Solution

The fourth proportional to 15,569.62, 21,486.67 and 8,855.87 is: 12,221.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,569.62 : 21,486.67 = 8,855.87 : x
  2. Step 2: Convert to fraction form
    15,569.62/21,486.67 = 8,855.87/x
  3. Step 3: Cross multiply
    15,569.62x = 21,486.67 × 8,855.87
  4. Step 4: Simplify right side
    15,569.62x = 190,283,026.68
  5. Step 5: Solve for x
    x = 190,283,026.68/15,569.62
  6. Step 6: Final answer
    x = 12,221.43

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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.