Home / 31,938.71-47,928.57-21,420.61

Finding the Fourth Proportional to 31,938.71, 47,928.57 and 21,420.61

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Solution

The fourth proportional to 31,938.71, 47,928.57 and 21,420.61 is: 32,144.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,938.71 : 47,928.57 = 21,420.61 : x
  2. Step 2: Convert to fraction form
    31,938.71/47,928.57 = 21,420.61/x
  3. Step 3: Cross multiply
    31,938.71x = 47,928.57 × 21,420.61
  4. Step 4: Simplify right side
    31,938.71x = 1,026,659,185.41
  5. Step 5: Solve for x
    x = 1,026,659,185.41/31,938.71
  6. Step 6: Final answer
    x = 32,144.67

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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.