Home / 18,711,119.70-28,066,679.55-12,971,556.90

Finding the Fourth Proportional to 18,711,119.70, 28,066,679.55 and 12,971,556.90

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Solution

The fourth proportional to 18,711,119.70, 28,066,679.55 and 12,971,556.90 is: 19,457,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711,119.70 : 28,066,679.55 = 12,971,556.90 : x
  2. Step 2: Convert to fraction form
    18,711,119.70/28,066,679.55 = 12,971,556.90/x
  3. Step 3: Cross multiply
    18,711,119.70x = 28,066,679.55 × 12,971,556.90
  4. Step 4: Simplify right side
    18,711,119.70x = 364,068,530,776,891.44
  5. Step 5: Solve for x
    x = 364,068,530,776,891.44/18,711,119.70
  6. Step 6: Final answer
    x = 19,457,335.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.