Home / 20,808.50-31,212.81-5,226.12

Finding the Fourth Proportional to 20,808.50, 31,212.81 and 5,226.12

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Solution

The fourth proportional to 20,808.50, 31,212.81 and 5,226.12 is: 7,839.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.50 : 31,212.81 = 5,226.12 : x
  2. Step 2: Convert to fraction form
    20,808.50/31,212.81 = 5,226.12/x
  3. Step 3: Cross multiply
    20,808.50x = 31,212.81 × 5,226.12
  4. Step 4: Simplify right side
    20,808.50x = 163,121,890.60
  5. Step 5: Solve for x
    x = 163,121,890.60/20,808.50
  6. Step 6: Final answer
    x = 7,839.20

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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.