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Finding the Fourth Proportional to 15,897.80, 21,939.96 and 8,824.34

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Solution

The fourth proportional to 15,897.80, 21,939.96 and 8,824.34 is: 12,178.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,897.80 : 21,939.96 = 8,824.34 : x
  2. Step 2: Convert to fraction form
    15,897.80/21,939.96 = 8,824.34/x
  3. Step 3: Cross multiply
    15,897.80x = 21,939.96 × 8,824.34
  4. Step 4: Simplify right side
    15,897.80x = 193,605,754.57
  5. Step 5: Solve for x
    x = 193,605,754.57/15,897.80
  6. Step 6: Final answer
    x = 12,178.15

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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.