Home / 21,139,902.28-29,172,568.97-12,438,638.47

Finding the Fourth Proportional to 21,139,902.28, 29,172,568.97 and 12,438,638.47

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Solution

The fourth proportional to 21,139,902.28, 29,172,568.97 and 12,438,638.47 is: 17,165,029.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139,902.28 : 29,172,568.97 = 12,438,638.47 : x
  2. Step 2: Convert to fraction form
    21,139,902.28/29,172,568.97 = 12,438,638.47/x
  3. Step 3: Cross multiply
    21,139,902.28x = 29,172,568.97 × 12,438,638.47
  4. Step 4: Simplify right side
    21,139,902.28x = 362,867,038,726,532.56
  5. Step 5: Solve for x
    x = 362,867,038,726,532.56/21,139,902.28
  6. Step 6: Final answer
    x = 17,165,029.14

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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.