Home / 28,520.29-42,780.16-7,743.79

Finding the Fourth Proportional to 28,520.29, 42,780.16 and 7,743.79

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Solution

The fourth proportional to 28,520.29, 42,780.16 and 7,743.79 is: 11,615.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.29 : 42,780.16 = 7,743.79 : x
  2. Step 2: Convert to fraction form
    28,520.29/42,780.16 = 7,743.79/x
  3. Step 3: Cross multiply
    28,520.29x = 42,780.16 × 7,743.79
  4. Step 4: Simplify right side
    28,520.29x = 331,280,575.21
  5. Step 5: Solve for x
    x = 331,280,575.21/28,520.29
  6. Step 6: Final answer
    x = 11,615.61

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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.