Home / 28,478.79-39,305.25-15,903.54

Finding the Fourth Proportional to 28,478.79, 39,305.25 and 15,903.54

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Solution

The fourth proportional to 28,478.79, 39,305.25 and 15,903.54 is: 21,949.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.79 : 39,305.25 = 15,903.54 : x
  2. Step 2: Convert to fraction form
    28,478.79/39,305.25 = 15,903.54/x
  3. Step 3: Cross multiply
    28,478.79x = 39,305.25 × 15,903.54
  4. Step 4: Simplify right side
    28,478.79x = 625,092,615.59
  5. Step 5: Solve for x
    x = 625,092,615.59/28,478.79
  6. Step 6: Final answer
    x = 21,949.41

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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.