Home / 20,780,999.70-31,171,499.55-8,646,430.20

Finding the Fourth Proportional to 20,780,999.70, 31,171,499.55 and 8,646,430.20

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Solution

The fourth proportional to 20,780,999.70, 31,171,499.55 and 8,646,430.20 is: 12,969,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780,999.70 : 31,171,499.55 = 8,646,430.20 : x
  2. Step 2: Convert to fraction form
    20,780,999.70/31,171,499.55 = 8,646,430.20/x
  3. Step 3: Cross multiply
    20,780,999.70x = 31,171,499.55 × 8,646,430.20
  4. Step 4: Simplify right side
    20,780,999.70x = 269,522,195,088,406.41
  5. Step 5: Solve for x
    x = 269,522,195,088,406.41/20,780,999.70
  6. Step 6: Final answer
    x = 12,969,645.30

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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.