Home / 20,665,378.92-28,522,171.26-13,683,742.32

Finding the Fourth Proportional to 20,665,378.92, 28,522,171.26 and 13,683,742.32

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Solution

The fourth proportional to 20,665,378.92, 28,522,171.26 and 13,683,742.32 is: 18,886,178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665,378.92 : 28,522,171.26 = 13,683,742.32 : x
  2. Step 2: Convert to fraction form
    20,665,378.92/28,522,171.26 = 13,683,742.32/x
  3. Step 3: Cross multiply
    20,665,378.92x = 28,522,171.26 × 13,683,742.32
  4. Step 4: Simplify right side
    20,665,378.92x = 390,290,041,928,749.75
  5. Step 5: Solve for x
    x = 390,290,041,928,749.75/20,665,378.92
  6. Step 6: Final answer
    x = 18,886,178.83

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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.