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Finding the Fourth Proportional to 26,641.84, 39,955.20 and 7,921.12

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Solution

The fourth proportional to 26,641.84, 39,955.20 and 7,921.12 is: 11,879.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,641.84 : 39,955.20 = 7,921.12 : x
  2. Step 2: Convert to fraction form
    26,641.84/39,955.20 = 7,921.12/x
  3. Step 3: Cross multiply
    26,641.84x = 39,955.20 × 7,921.12
  4. Step 4: Simplify right side
    26,641.84x = 316,489,933.82
  5. Step 5: Solve for x
    x = 316,489,933.82/26,641.84
  6. Step 6: Final answer
    x = 11,879.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.