Home / 28,305.78-39,062.46-15,730.56

Finding the Fourth Proportional to 28,305.78, 39,062.46 and 15,730.56

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Solution

The fourth proportional to 28,305.78, 39,062.46 and 15,730.56 is: 21,708.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.78 : 39,062.46 = 15,730.56 : x
  2. Step 2: Convert to fraction form
    28,305.78/39,062.46 = 15,730.56/x
  3. Step 3: Cross multiply
    28,305.78x = 39,062.46 × 15,730.56
  4. Step 4: Simplify right side
    28,305.78x = 614,474,370.78
  5. Step 5: Solve for x
    x = 614,474,370.78/28,305.78
  6. Step 6: Final answer
    x = 21,708.44

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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.