Home / 10,501.45-15,722.20-7,999.86

Finding the Fourth Proportional to 10,501.45, 15,722.20 and 7,999.86

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Solution

The fourth proportional to 10,501.45, 15,722.20 and 7,999.86 is: 11,976.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,501.45 : 15,722.20 = 7,999.86 : x
  2. Step 2: Convert to fraction form
    10,501.45/15,722.20 = 7,999.86/x
  3. Step 3: Cross multiply
    10,501.45x = 15,722.20 × 7,999.86
  4. Step 4: Simplify right side
    10,501.45x = 125,775,467.85
  5. Step 5: Solve for x
    x = 125,775,467.85/10,501.45
  6. Step 6: Final answer
    x = 11,976.96

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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.