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Finding the Fourth Proportional to 15,220.77, 20,998.41 and 9,251.49

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Solution

The fourth proportional to 15,220.77, 20,998.41 and 9,251.49 is: 12,763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220.77 : 20,998.41 = 9,251.49 : x
  2. Step 2: Convert to fraction form
    15,220.77/20,998.41 = 9,251.49/x
  3. Step 3: Cross multiply
    15,220.77x = 20,998.41 × 9,251.49
  4. Step 4: Simplify right side
    15,220.77x = 194,266,580.13
  5. Step 5: Solve for x
    x = 194,266,580.13/15,220.77
  6. Step 6: Final answer
    x = 12,763.26

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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.