Home / 10,879.56-15,013.62-6,402.78

Finding the Fourth Proportional to 10,879.56, 15,013.62 and 6,402.78

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Solution

The fourth proportional to 10,879.56, 15,013.62 and 6,402.78 is: 8,835.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.56 : 15,013.62 = 6,402.78 : x
  2. Step 2: Convert to fraction form
    10,879.56/15,013.62 = 6,402.78/x
  3. Step 3: Cross multiply
    10,879.56x = 15,013.62 × 6,402.78
  4. Step 4: Simplify right side
    10,879.56x = 96,128,905.86
  5. Step 5: Solve for x
    x = 96,128,905.86/10,879.56
  6. Step 6: Final answer
    x = 8,835.73

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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.