Home / 28,943,885.70-39,942,640.86-15,891,990

Finding the Fourth Proportional to 28,943,885.70, 39,942,640.86 and 15,891,990

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Solution

The fourth proportional to 28,943,885.70, 39,942,640.86 and 15,891,990 is: 21,930,989.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,943,885.70 : 39,942,640.86 = 15,891,990 : x
  2. Step 2: Convert to fraction form
    28,943,885.70/39,942,640.86 = 15,891,990/x
  3. Step 3: Cross multiply
    28,943,885.70x = 39,942,640.86 × 15,891,990
  4. Step 4: Simplify right side
    28,943,885.70x = 634,768,049,120,711.38
  5. Step 5: Solve for x
    x = 634,768,049,120,711.38/28,943,885.70
  6. Step 6: Final answer
    x = 21,930,989.35

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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.