Home / 21,143,321.40-31,714,982.10-12,640,265.40

Finding the Fourth Proportional to 21,143,321.40, 31,714,982.10 and 12,640,265.40

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Solution

The fourth proportional to 21,143,321.40, 31,714,982.10 and 12,640,265.40 is: 18,960,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,321.40 : 31,714,982.10 = 12,640,265.40 : x
  2. Step 2: Convert to fraction form
    21,143,321.40/31,714,982.10 = 12,640,265.40/x
  3. Step 3: Cross multiply
    21,143,321.40x = 31,714,982.10 × 12,640,265.40
  4. Step 4: Simplify right side
    21,143,321.40x = 400,885,790,900,249.38
  5. Step 5: Solve for x
    x = 400,885,790,900,249.38/21,143,321.40
  6. Step 6: Final answer
    x = 18,960,398.10

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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.