Home / 20,815,605.40-31,223,408.10-13,248,002.20

Finding the Fourth Proportional to 20,815,605.40, 31,223,408.10 and 13,248,002.20

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Solution

The fourth proportional to 20,815,605.40, 31,223,408.10 and 13,248,002.20 is: 19,872,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815,605.40 : 31,223,408.10 = 13,248,002.20 : x
  2. Step 2: Convert to fraction form
    20,815,605.40/31,223,408.10 = 13,248,002.20/x
  3. Step 3: Cross multiply
    20,815,605.40x = 31,223,408.10 × 13,248,002.20
  4. Step 4: Simplify right side
    20,815,605.40x = 413,647,779,200,297.81
  5. Step 5: Solve for x
    x = 413,647,779,200,297.81/20,815,605.40
  6. Step 6: Final answer
    x = 19,872,003.30

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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.