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Finding the Fourth Proportional to 15,579,715.50, 21,499,611.30 and 8,704,249.20

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Solution

The fourth proportional to 15,579,715.50, 21,499,611.30 and 8,704,249.20 is: 12,011,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,579,715.50 : 21,499,611.30 = 8,704,249.20 : x
  2. Step 2: Convert to fraction form
    15,579,715.50/21,499,611.30 = 8,704,249.20/x
  3. Step 3: Cross multiply
    15,579,715.50x = 21,499,611.30 × 8,704,249.20
  4. Step 4: Simplify right side
    15,579,715.50x = 187,137,974,458,335.94
  5. Step 5: Solve for x
    x = 187,137,974,458,335.94/15,579,715.50
  6. Step 6: Final answer
    x = 12,011,642.60

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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.