Home / 21,139,915.09-29,172,586.65-12,438,651.28

Finding the Fourth Proportional to 21,139,915.09, 29,172,586.65 and 12,438,651.28

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Solution

The fourth proportional to 21,139,915.09, 29,172,586.65 and 12,438,651.28 is: 17,165,046.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139,915.09 : 29,172,586.65 = 12,438,651.28 : x
  2. Step 2: Convert to fraction form
    21,139,915.09/29,172,586.65 = 12,438,651.28/x
  3. Step 3: Cross multiply
    21,139,915.09x = 29,172,586.65 × 12,438,651.28
  4. Step 4: Simplify right side
    21,139,915.09x = 362,867,632,274,933.38
  5. Step 5: Solve for x
    x = 362,867,632,274,933.38/21,139,915.09
  6. Step 6: Final answer
    x = 17,165,046.82

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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.