Home / 20,430,143.20-28,194,867.12-11,262,769.12

Finding the Fourth Proportional to 20,430,143.20, 28,194,867.12 and 11,262,769.12

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Solution

The fourth proportional to 20,430,143.20, 28,194,867.12 and 11,262,769.12 is: 15,543,321.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430,143.20 : 28,194,867.12 = 11,262,769.12 : x
  2. Step 2: Convert to fraction form
    20,430,143.20/28,194,867.12 = 11,262,769.12/x
  3. Step 3: Cross multiply
    20,430,143.20x = 28,194,867.12 × 11,262,769.12
  4. Step 4: Simplify right side
    20,430,143.20x = 317,552,278,741,639.31
  5. Step 5: Solve for x
    x = 317,552,278,741,639.31/20,430,143.20
  6. Step 6: Final answer
    x = 15,543,321.24

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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.