Home / 20,888.30-31,330.79-8,399.52

Finding the Fourth Proportional to 20,888.30, 31,330.79 and 8,399.52

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Solution

The fourth proportional to 20,888.30, 31,330.79 and 8,399.52 is: 12,598.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.30 : 31,330.79 = 8,399.52 : x
  2. Step 2: Convert to fraction form
    20,888.30/31,330.79 = 8,399.52/x
  3. Step 3: Cross multiply
    20,888.30x = 31,330.79 × 8,399.52
  4. Step 4: Simplify right side
    20,888.30x = 263,163,597.22
  5. Step 5: Solve for x
    x = 263,163,597.22/20,888.30
  6. Step 6: Final answer
    x = 12,598.61

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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.