Home / 34,720.43-47,911.32-20,378.72

Finding the Fourth Proportional to 34,720.43, 47,911.32 and 20,378.72

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Solution

The fourth proportional to 34,720.43, 47,911.32 and 20,378.72 is: 28,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,720.43 : 47,911.32 = 20,378.72 : x
  2. Step 2: Convert to fraction form
    34,720.43/47,911.32 = 20,378.72/x
  3. Step 3: Cross multiply
    34,720.43x = 47,911.32 × 20,378.72
  4. Step 4: Simplify right side
    34,720.43x = 976,371,375.11
  5. Step 5: Solve for x
    x = 976,371,375.11/34,720.43
  6. Step 6: Final answer
    x = 28,120.95

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1.5x scale

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.