Home / 20,538,415.72-28,344,915.12-11,371,058.56

Finding the Fourth Proportional to 20,538,415.72, 28,344,915.12 and 11,371,058.56

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Solution

The fourth proportional to 20,538,415.72, 28,344,915.12 and 11,371,058.56 is: 15,693,113.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538,415.72 : 28,344,915.12 = 11,371,058.56 : x
  2. Step 2: Convert to fraction form
    20,538,415.72/28,344,915.12 = 11,371,058.56/x
  3. Step 3: Cross multiply
    20,538,415.72x = 28,344,915.12 × 11,371,058.56
  4. Step 4: Simplify right side
    20,538,415.72x = 322,311,689,707,749.44
  5. Step 5: Solve for x
    x = 322,311,689,707,749.44/20,538,415.72
  6. Step 6: Final answer
    x = 15,693,113.53

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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.