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Finding the Fourth Proportional to 14,479,728.64, 19,985,505.68 and 8,288,364.48

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Solution

The fourth proportional to 14,479,728.64, 19,985,505.68 and 8,288,364.48 is: 11,439,935.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,479,728.64 : 19,985,505.68 = 8,288,364.48 : x
  2. Step 2: Convert to fraction form
    14,479,728.64/19,985,505.68 = 8,288,364.48/x
  3. Step 3: Cross multiply
    14,479,728.64x = 19,985,505.68 × 8,288,364.48
  4. Step 4: Simplify right side
    14,479,728.64x = 165,647,155,392,950.25
  5. Step 5: Solve for x
    x = 165,647,155,392,950.25/14,479,728.64
  6. Step 6: Final answer
    x = 11,439,935.06

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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.