Home / 20,899.16-31,348.26-5,316.80

Finding the Fourth Proportional to 20,899.16, 31,348.26 and 5,316.80

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Solution

The fourth proportional to 20,899.16, 31,348.26 and 5,316.80 is: 7,975.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.16 : 31,348.26 = 5,316.80 : x
  2. Step 2: Convert to fraction form
    20,899.16/31,348.26 = 5,316.80/x
  3. Step 3: Cross multiply
    20,899.16x = 31,348.26 × 5,316.80
  4. Step 4: Simplify right side
    20,899.16x = 166,672,428.77
  5. Step 5: Solve for x
    x = 166,672,428.77/20,899.16
  6. Step 6: Final answer
    x = 7,975.08

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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.