Home / 10,120.20-13,971.80-6,399.24

Finding the Fourth Proportional to 10,120.20, 13,971.80 and 6,399.24

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Solution

The fourth proportional to 10,120.20, 13,971.80 and 6,399.24 is: 8,834.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120.20 : 13,971.80 = 6,399.24 : x
  2. Step 2: Convert to fraction form
    10,120.20/13,971.80 = 6,399.24/x
  3. Step 3: Cross multiply
    10,120.20x = 13,971.80 × 6,399.24
  4. Step 4: Simplify right side
    10,120.20x = 89,408,901.43
  5. Step 5: Solve for x
    x = 89,408,901.43/10,120.20
  6. Step 6: Final answer
    x = 8,834.70

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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.