Home / 20,891.16-31,336.26-5,308.80

Finding the Fourth Proportional to 20,891.16, 31,336.26 and 5,308.80

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Solution

The fourth proportional to 20,891.16, 31,336.26 and 5,308.80 is: 7,963.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.16 : 31,336.26 = 5,308.80 : x
  2. Step 2: Convert to fraction form
    20,891.16/31,336.26 = 5,308.80/x
  3. Step 3: Cross multiply
    20,891.16x = 31,336.26 × 5,308.80
  4. Step 4: Simplify right side
    20,891.16x = 166,357,937.09
  5. Step 5: Solve for x
    x = 166,357,937.09/20,891.16
  6. Step 6: Final answer
    x = 7,963.08

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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.