Home / 31,742.72-47,630.40-15,121.60

Finding the Fourth Proportional to 31,742.72, 47,630.40 and 15,121.60

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Solution

The fourth proportional to 31,742.72, 47,630.40 and 15,121.60 is: 22,690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,742.72 : 47,630.40 = 15,121.60 : x
  2. Step 2: Convert to fraction form
    31,742.72/47,630.40 = 15,121.60/x
  3. Step 3: Cross multiply
    31,742.72x = 47,630.40 × 15,121.60
  4. Step 4: Simplify right side
    31,742.72x = 720,247,856.64
  5. Step 5: Solve for x
    x = 720,247,856.64/31,742.72
  6. Step 6: Final answer
    x = 22,690.17

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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.