Home / 20,815,602.40-31,223,403.60-13,247,999.20

Finding the Fourth Proportional to 20,815,602.40, 31,223,403.60 and 13,247,999.20

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Solution

The fourth proportional to 20,815,602.40, 31,223,403.60 and 13,247,999.20 is: 19,871,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815,602.40 : 31,223,403.60 = 13,247,999.20 : x
  2. Step 2: Convert to fraction form
    20,815,602.40/31,223,403.60 = 13,247,999.20/x
  3. Step 3: Cross multiply
    20,815,602.40x = 31,223,403.60 × 13,247,999.20
  4. Step 4: Simplify right side
    20,815,602.40x = 413,647,625,914,077.12
  5. Step 5: Solve for x
    x = 413,647,625,914,077.12/20,815,602.40
  6. Step 6: Final answer
    x = 19,871,998.80

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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.