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Finding the Fourth Proportional to 14,503,868.72, 20,015,378.72 and 7,978,166.88

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Solution

The fourth proportional to 14,503,868.72, 20,015,378.72 and 7,978,166.88 is: 11,009,892.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,503,868.72 : 20,015,378.72 = 7,978,166.88 : x
  2. Step 2: Convert to fraction form
    14,503,868.72/20,015,378.72 = 7,978,166.88/x
  3. Step 3: Cross multiply
    14,503,868.72x = 20,015,378.72 × 7,978,166.88
  4. Step 4: Simplify right side
    14,503,868.72x = 159,686,031,594,560.78
  5. Step 5: Solve for x
    x = 159,686,031,594,560.78/14,503,868.72
  6. Step 6: Final answer
    x = 11,009,892.23

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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.