Home / 21,240.74-31,859.05-6,449.79

Finding the Fourth Proportional to 21,240.74, 31,859.05 and 6,449.79

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Solution

The fourth proportional to 21,240.74, 31,859.05 and 6,449.79 is: 9,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.74 : 31,859.05 = 6,449.79 : x
  2. Step 2: Convert to fraction form
    21,240.74/31,859.05 = 6,449.79/x
  3. Step 3: Cross multiply
    21,240.74x = 31,859.05 × 6,449.79
  4. Step 4: Simplify right side
    21,240.74x = 205,483,990.56
  5. Step 5: Solve for x
    x = 205,483,990.56/21,240.74
  6. Step 6: Final answer
    x = 9,674.05

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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.