Home / 39,938.28-55,139.58-28,049.64

Finding the Fourth Proportional to 39,938.28, 55,139.58 and 28,049.64

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Solution

The fourth proportional to 39,938.28, 55,139.58 and 28,049.64 is: 38,725.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,938.28 : 55,139.58 = 28,049.64 : x
  2. Step 2: Convert to fraction form
    39,938.28/55,139.58 = 28,049.64/x
  3. Step 3: Cross multiply
    39,938.28x = 55,139.58 × 28,049.64
  4. Step 4: Simplify right side
    39,938.28x = 1,546,645,368.75
  5. Step 5: Solve for x
    x = 1,546,645,368.75/39,938.28
  6. Step 6: Final answer
    x = 38,725.89

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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.