Home / 20,860,311.40-31,290,467.10-10,656,644.20

Finding the Fourth Proportional to 20,860,311.40, 31,290,467.10 and 10,656,644.20

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Solution

The fourth proportional to 20,860,311.40, 31,290,467.10 and 10,656,644.20 is: 15,984,966.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860,311.40 : 31,290,467.10 = 10,656,644.20 : x
  2. Step 2: Convert to fraction form
    20,860,311.40/31,290,467.10 = 10,656,644.20/x
  3. Step 3: Cross multiply
    20,860,311.40x = 31,290,467.10 × 10,656,644.20
  4. Step 4: Simplify right side
    20,860,311.40x = 333,451,374,736,505.81
  5. Step 5: Solve for x
    x = 333,451,374,736,505.81/20,860,311.40
  6. Step 6: Final answer
    x = 15,984,966.30

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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.