Home / 20,819,120.22-28,726,958.34-13,078,680.84

Finding the Fourth Proportional to 20,819,120.22, 28,726,958.34 and 13,078,680.84

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Solution

The fourth proportional to 20,819,120.22, 28,726,958.34 and 13,078,680.84 is: 18,046,426.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819,120.22 : 28,726,958.34 = 13,078,680.84 : x
  2. Step 2: Convert to fraction form
    20,819,120.22/28,726,958.34 = 13,078,680.84/x
  3. Step 3: Cross multiply
    20,819,120.22x = 28,726,958.34 × 13,078,680.84
  4. Step 4: Simplify right side
    20,819,120.22x = 375,710,719,632,836.19
  5. Step 5: Solve for x
    x = 375,710,719,632,836.19/20,819,120.22
  6. Step 6: Final answer
    x = 18,046,426.35

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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.