Home / 21,680,221.23-29,915,947.12-12,388,393.60

Finding the Fourth Proportional to 21,680,221.23, 29,915,947.12 and 12,388,393.60

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Solution

The fourth proportional to 21,680,221.23, 29,915,947.12 and 12,388,393.60 is: 17,094,407.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,680,221.23 : 29,915,947.12 = 12,388,393.60 : x
  2. Step 2: Convert to fraction form
    21,680,221.23/29,915,947.12 = 12,388,393.60/x
  3. Step 3: Cross multiply
    21,680,221.23x = 29,915,947.12 × 12,388,393.60
  4. Step 4: Simplify right side
    21,680,221.23x = 370,610,527,777,404.44
  5. Step 5: Solve for x
    x = 370,610,527,777,404.44/21,680,221.23
  6. Step 6: Final answer
    x = 17,094,407.11

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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.