Home / 20,738,019.40-31,107,029.10-12,213,968.20

Finding the Fourth Proportional to 20,738,019.40, 31,107,029.10 and 12,213,968.20

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Solution

The fourth proportional to 20,738,019.40, 31,107,029.10 and 12,213,968.20 is: 18,320,952.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738,019.40 : 31,107,029.10 = 12,213,968.20 : x
  2. Step 2: Convert to fraction form
    20,738,019.40/31,107,029.10 = 12,213,968.20/x
  3. Step 3: Cross multiply
    20,738,019.40x = 31,107,029.10 × 12,213,968.20
  4. Step 4: Simplify right side
    20,738,019.40x = 379,940,264,223,874.62
  5. Step 5: Solve for x
    x = 379,940,264,223,874.62/20,738,019.40
  6. Step 6: Final answer
    x = 18,320,952.30

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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.