Home / 21,780,128.20-32,670,192.30-18,378,905.80

Finding the Fourth Proportional to 21,780,128.20, 32,670,192.30 and 18,378,905.80

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Solution

The fourth proportional to 21,780,128.20, 32,670,192.30 and 18,378,905.80 is: 27,568,358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780,128.20 : 32,670,192.30 = 18,378,905.80 : x
  2. Step 2: Convert to fraction form
    21,780,128.20/32,670,192.30 = 18,378,905.80/x
  3. Step 3: Cross multiply
    21,780,128.20x = 32,670,192.30 × 18,378,905.80
  4. Step 4: Simplify right side
    21,780,128.20x = 600,442,386,749,585.38
  5. Step 5: Solve for x
    x = 600,442,386,749,585.38/21,780,128.20
  6. Step 6: Final answer
    x = 27,568,358.70

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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.