Home / 21,089.87-31,640.31-6,298.79

Finding the Fourth Proportional to 21,089.87, 31,640.31 and 6,298.79

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Solution

The fourth proportional to 21,089.87, 31,640.31 and 6,298.79 is: 9,449.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.87 : 31,640.31 = 6,298.79 : x
  2. Step 2: Convert to fraction form
    21,089.87/31,640.31 = 6,298.79/x
  3. Step 3: Cross multiply
    21,089.87x = 31,640.31 × 6,298.79
  4. Step 4: Simplify right side
    21,089.87x = 199,295,668.22
  5. Step 5: Solve for x
    x = 199,295,668.22/21,089.87
  6. Step 6: Final answer
    x = 9,449.83

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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.