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Finding the Fourth Proportional to 15,661.50, 21,624.21 and 10,082.22

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Solution

The fourth proportional to 15,661.50, 21,624.21 and 10,082.22 is: 13,920.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.50 : 21,624.21 = 10,082.22 : x
  2. Step 2: Convert to fraction form
    15,661.50/21,624.21 = 10,082.22/x
  3. Step 3: Cross multiply
    15,661.50x = 21,624.21 × 10,082.22
  4. Step 4: Simplify right side
    15,661.50x = 218,020,042.55
  5. Step 5: Solve for x
    x = 218,020,042.55/15,661.50
  6. Step 6: Final answer
    x = 13,920.76

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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.