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Finding the Fourth Proportional to 15,544.78, 21,451.78 and 8,471.19

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Solution

The fourth proportional to 15,544.78, 21,451.78 and 8,471.19 is: 11,690.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,544.78 : 21,451.78 = 8,471.19 : x
  2. Step 2: Convert to fraction form
    15,544.78/21,451.78 = 8,471.19/x
  3. Step 3: Cross multiply
    15,544.78x = 21,451.78 × 8,471.19
  4. Step 4: Simplify right side
    15,544.78x = 181,722,104.22
  5. Step 5: Solve for x
    x = 181,722,104.22/15,544.78
  6. Step 6: Final answer
    x = 11,690.23

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Double scale
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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.