Home / 28,750.50-42,948.90-20,784.96

Finding the Fourth Proportional to 28,750.50, 42,948.90 and 20,784.96

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Solution

The fourth proportional to 28,750.50, 42,948.90 and 20,784.96 is: 31,049.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,750.50 : 42,948.90 = 20,784.96 : x
  2. Step 2: Convert to fraction form
    28,750.50/42,948.90 = 20,784.96/x
  3. Step 3: Cross multiply
    28,750.50x = 42,948.90 × 20,784.96
  4. Step 4: Simplify right side
    28,750.50x = 892,691,168.54
  5. Step 5: Solve for x
    x = 892,691,168.54/28,750.50
  6. Step 6: Final answer
    x = 31,049.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.