Home / 20,511,521.71-28,314,615.59-12,780,383.76

Finding the Fourth Proportional to 20,511,521.71, 28,314,615.59 and 12,780,383.76

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Solution

The fourth proportional to 20,511,521.71, 28,314,615.59 and 12,780,383.76 is: 17,642,360.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511,521.71 : 28,314,615.59 = 12,780,383.76 : x
  2. Step 2: Convert to fraction form
    20,511,521.71/28,314,615.59 = 12,780,383.76/x
  3. Step 3: Cross multiply
    20,511,521.71x = 28,314,615.59 × 12,780,383.76
  4. Step 4: Simplify right side
    20,511,521.71x = 361,871,653,241,103.38
  5. Step 5: Solve for x
    x = 361,871,653,241,103.38/20,511,521.71
  6. Step 6: Final answer
    x = 17,642,360.15

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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.