Home / 15,717.74-21,689.91-8,644.10

Finding the Fourth Proportional to 15,717.74, 21,689.91 and 8,644.10

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Solution

The fourth proportional to 15,717.74, 21,689.91 and 8,644.10 is: 11,928.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.74 : 21,689.91 = 8,644.10 : x
  2. Step 2: Convert to fraction form
    15,717.74/21,689.91 = 8,644.10/x
  3. Step 3: Cross multiply
    15,717.74x = 21,689.91 × 8,644.10
  4. Step 4: Simplify right side
    15,717.74x = 187,489,642.58
  5. Step 5: Solve for x
    x = 187,489,642.58/15,717.74
  6. Step 6: Final answer
    x = 11,928.54

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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.