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Finding the Fourth Proportional to 15,571.38, 21,484.38 and 8,855.93

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Solution

The fourth proportional to 15,571.38, 21,484.38 and 8,855.93 is: 12,218.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.38 : 21,484.38 = 8,855.93 : x
  2. Step 2: Convert to fraction form
    15,571.38/21,484.38 = 8,855.93/x
  3. Step 3: Cross multiply
    15,571.38x = 21,484.38 × 8,855.93
  4. Step 4: Simplify right side
    15,571.38x = 190,264,057.95
  5. Step 5: Solve for x
    x = 190,264,057.95/15,571.38
  6. Step 6: Final answer
    x = 12,218.83

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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.