Home / 15,717.22-21,689.58-8,643.22

Finding the Fourth Proportional to 15,717.22, 21,689.58 and 8,643.22

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Solution

The fourth proportional to 15,717.22, 21,689.58 and 8,643.22 is: 11,927.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.22 : 21,689.58 = 8,643.22 : x
  2. Step 2: Convert to fraction form
    15,717.22/21,689.58 = 8,643.22/x
  3. Step 3: Cross multiply
    15,717.22x = 21,689.58 × 8,643.22
  4. Step 4: Simplify right side
    15,717.22x = 187,467,811.65
  5. Step 5: Solve for x
    x = 187,467,811.65/15,717.22
  6. Step 6: Final answer
    x = 11,927.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.