Home / 39,383.60-54,349.46-21,478.72

Finding the Fourth Proportional to 39,383.60, 54,349.46 and 21,478.72

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Solution

The fourth proportional to 39,383.60, 54,349.46 and 21,478.72 is: 29,640.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,383.60 : 54,349.46 = 21,478.72 : x
  2. Step 2: Convert to fraction form
    39,383.60/54,349.46 = 21,478.72/x
  3. Step 3: Cross multiply
    39,383.60x = 54,349.46 × 21,478.72
  4. Step 4: Simplify right side
    39,383.60x = 1,167,356,833.49
  5. Step 5: Solve for x
    x = 1,167,356,833.49/39,383.60
  6. Step 6: Final answer
    x = 29,640.68

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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.