Home / 31,736.40-47,620.90-13,979.50

Finding the Fourth Proportional to 31,736.40, 47,620.90 and 13,979.50

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Solution

The fourth proportional to 31,736.40, 47,620.90 and 13,979.50 is: 20,976.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,736.40 : 47,620.90 = 13,979.50 : x
  2. Step 2: Convert to fraction form
    31,736.40/47,620.90 = 13,979.50/x
  3. Step 3: Cross multiply
    31,736.40x = 47,620.90 × 13,979.50
  4. Step 4: Simplify right side
    31,736.40x = 665,716,371.55
  5. Step 5: Solve for x
    x = 665,716,371.55/31,736.40
  6. Step 6: Final answer
    x = 20,976.43

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1.5x scale

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.