Home / 20,620,672.72-30,943,782-11,988,835.12

Finding the Fourth Proportional to 20,620,672.72, 30,943,782 and 11,988,835.12

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Solution

The fourth proportional to 20,620,672.72, 30,943,782 and 11,988,835.12 is: 17,990,678.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620,672.72 : 30,943,782 = 11,988,835.12 : x
  2. Step 2: Convert to fraction form
    20,620,672.72/30,943,782 = 11,988,835.12/x
  3. Step 3: Cross multiply
    20,620,672.72x = 30,943,782 × 11,988,835.12
  4. Step 4: Simplify right side
    20,620,672.72x = 370,979,900,387,223.81
  5. Step 5: Solve for x
    x = 370,979,900,387,223.81/20,620,672.72
  6. Step 6: Final answer
    x = 17,990,678.84

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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.