Home / 39,731.76-54,827.60-21,829.20

Finding the Fourth Proportional to 39,731.76, 54,827.60 and 21,829.20

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Solution

The fourth proportional to 39,731.76, 54,827.60 and 21,829.20 is: 30,123.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,731.76 : 54,827.60 = 21,829.20 : x
  2. Step 2: Convert to fraction form
    39,731.76/54,827.60 = 21,829.20/x
  3. Step 3: Cross multiply
    39,731.76x = 54,827.60 × 21,829.20
  4. Step 4: Simplify right side
    39,731.76x = 1,196,842,645.92
  5. Step 5: Solve for x
    x = 1,196,842,645.92/39,731.76
  6. Step 6: Final answer
    x = 30,123.07

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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.