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Finding the Fourth Proportional to 15,788,509.85, 21,809,468.99 and 11,897,676.59

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Solution

The fourth proportional to 15,788,509.85, 21,809,468.99 and 11,897,676.59 is: 16,434,863.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788,509.85 : 21,809,468.99 = 11,897,676.59 : x
  2. Step 2: Convert to fraction form
    15,788,509.85/21,809,468.99 = 11,897,676.59/x
  3. Step 3: Cross multiply
    15,788,509.85x = 21,809,468.99 × 11,897,676.59
  4. Step 4: Simplify right side
    15,788,509.85x = 259,482,008,563,350.81
  5. Step 5: Solve for x
    x = 259,482,008,563,350.81/15,788,509.85
  6. Step 6: Final answer
    x = 16,434,863.77

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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.