Home / 28,325.28-39,086.40-15,750.72

Finding the Fourth Proportional to 28,325.28, 39,086.40 and 15,750.72

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Solution

The fourth proportional to 28,325.28, 39,086.40 and 15,750.72 is: 21,734.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,325.28 : 39,086.40 = 15,750.72 : x
  2. Step 2: Convert to fraction form
    28,325.28/39,086.40 = 15,750.72/x
  3. Step 3: Cross multiply
    28,325.28x = 39,086.40 × 15,750.72
  4. Step 4: Simplify right side
    28,325.28x = 615,638,942.21
  5. Step 5: Solve for x
    x = 615,638,942.21/28,325.28
  6. Step 6: Final answer
    x = 21,734.61

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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.