Home / 20,511,536.92-28,314,636.60-12,780,398.98

Finding the Fourth Proportional to 20,511,536.92, 28,314,636.60 and 12,780,398.98

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Solution

The fourth proportional to 20,511,536.92, 28,314,636.60 and 12,780,398.98 is: 17,642,381.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,536.92 : 28,314,636.60 = 12,780,398.98 : x
  2. Step 2: Convert to fraction form
    20,511,536.92/28,314,636.60 = 12,780,398.98/x
  3. Step 3: Cross multiply
    20,511,536.92x = 28,314,636.60 × 12,780,398.98
  4. Step 4: Simplify right side
    20,511,536.92x = 361,872,352,721,710.69
  5. Step 5: Solve for x
    x = 361,872,352,721,710.69/20,511,536.92
  6. Step 6: Final answer
    x = 17,642,381.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.