Home / 20,899.30-31,348.77-5,316.88

Finding the Fourth Proportional to 20,899.30, 31,348.77 and 5,316.88

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Solution

The fourth proportional to 20,899.30, 31,348.77 and 5,316.88 is: 7,975.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.30 : 31,348.77 = 5,316.88 : x
  2. Step 2: Convert to fraction form
    20,899.30/31,348.77 = 5,316.88/x
  3. Step 3: Cross multiply
    20,899.30x = 31,348.77 × 5,316.88
  4. Step 4: Simplify right side
    20,899.30x = 166,677,648.24
  5. Step 5: Solve for x
    x = 166,677,648.24/20,899.30
  6. Step 6: Final answer
    x = 7,975.27

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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.