Home / 20,781,003.70-31,171,505.55-8,646,434.20

Finding the Fourth Proportional to 20,781,003.70, 31,171,505.55 and 8,646,434.20

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Solution

The fourth proportional to 20,781,003.70, 31,171,505.55 and 8,646,434.20 is: 12,969,651.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,003.70 : 31,171,505.55 = 8,646,434.20 : x
  2. Step 2: Convert to fraction form
    20,781,003.70/31,171,505.55 = 8,646,434.20/x
  3. Step 3: Cross multiply
    20,781,003.70x = 31,171,505.55 × 8,646,434.20
  4. Step 4: Simplify right side
    20,781,003.70x = 269,522,371,653,009.78
  5. Step 5: Solve for x
    x = 269,522,371,653,009.78/20,781,003.70
  6. Step 6: Final answer
    x = 12,969,651.30

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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.