Home / 39,405.78-54,380.16-21,501.17

Finding the Fourth Proportional to 39,405.78, 54,380.16 and 21,501.17

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Solution

The fourth proportional to 39,405.78, 54,380.16 and 21,501.17 is: 29,671.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.78 : 54,380.16 = 21,501.17 : x
  2. Step 2: Convert to fraction form
    39,405.78/54,380.16 = 21,501.17/x
  3. Step 3: Cross multiply
    39,405.78x = 54,380.16 × 21,501.17
  4. Step 4: Simplify right side
    39,405.78x = 1,169,236,928.84
  5. Step 5: Solve for x
    x = 1,169,236,928.84/39,405.78
  6. Step 6: Final answer
    x = 29,671.71

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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.