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Finding the Fourth Proportional to 15,666, 21,618.96 and 8,950.56

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Solution

The fourth proportional to 15,666, 21,618.96 and 8,950.56 is: 12,351.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666 : 21,618.96 = 8,950.56 : x
  2. Step 2: Convert to fraction form
    15,666/21,618.96 = 8,950.56/x
  3. Step 3: Cross multiply
    15,666x = 21,618.96 × 8,950.56
  4. Step 4: Simplify right side
    15,666x = 193,501,798.62
  5. Step 5: Solve for x
    x = 193,501,798.62/15,666
  6. Step 6: Final answer
    x = 12,351.70

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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.