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Finding the Fourth Proportional to 15,488,978.50, 21,375,193.62 and 8,519,835.70

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Solution

The fourth proportional to 15,488,978.50, 21,375,193.62 and 8,519,835.70 is: 11,757,595.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,488,978.50 : 21,375,193.62 = 8,519,835.70 : x
  2. Step 2: Convert to fraction form
    15,488,978.50/21,375,193.62 = 8,519,835.70/x
  3. Step 3: Cross multiply
    15,488,978.50x = 21,375,193.62 × 8,519,835.70
  4. Step 4: Simplify right side
    15,488,978.50x = 182,113,137,698,088.22
  5. Step 5: Solve for x
    x = 182,113,137,698,088.22/15,488,978.50
  6. Step 6: Final answer
    x = 11,757,595.10

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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.