Home / 28,520.20-42,780.32-7,743.68

Finding the Fourth Proportional to 28,520.20, 42,780.32 and 7,743.68

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Solution

The fourth proportional to 28,520.20, 42,780.32 and 7,743.68 is: 11,615.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.20 : 42,780.32 = 7,743.68 : x
  2. Step 2: Convert to fraction form
    28,520.20/42,780.32 = 7,743.68/x
  3. Step 3: Cross multiply
    28,520.20x = 42,780.32 × 7,743.68
  4. Step 4: Simplify right side
    28,520.20x = 331,277,108.38
  5. Step 5: Solve for x
    x = 331,277,108.38/28,520.20
  6. Step 6: Final answer
    x = 11,615.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.