Home / 20,815.26-31,221.93-7,666.74

Finding the Fourth Proportional to 20,815.26, 31,221.93 and 7,666.74

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Solution

The fourth proportional to 20,815.26, 31,221.93 and 7,666.74 is: 11,499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.26 : 31,221.93 = 7,666.74 : x
  2. Step 2: Convert to fraction form
    20,815.26/31,221.93 = 7,666.74/x
  3. Step 3: Cross multiply
    20,815.26x = 31,221.93 × 7,666.74
  4. Step 4: Simplify right side
    20,815.26x = 239,370,419.61
  5. Step 5: Solve for x
    x = 239,370,419.61/20,815.26
  6. Step 6: Final answer
    x = 11,499.76

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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.