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Finding the Fourth Proportional to 14,503,861.72, 20,015,369.06 and 7,978,159.88

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Solution

The fourth proportional to 14,503,861.72, 20,015,369.06 and 7,978,159.88 is: 11,009,882.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,503,861.72 : 20,015,369.06 = 7,978,159.88 : x
  2. Step 2: Convert to fraction form
    14,503,861.72/20,015,369.06 = 7,978,159.88/x
  3. Step 3: Cross multiply
    14,503,861.72x = 20,015,369.06 × 7,978,159.88
  4. Step 4: Simplify right side
    14,503,861.72x = 159,685,814,417,885.31
  5. Step 5: Solve for x
    x = 159,685,814,417,885.31/14,503,861.72
  6. Step 6: Final answer
    x = 11,009,882.57

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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.