Home / 15,136.58-20,887.88-8,422.22

Finding the Fourth Proportional to 15,136.58, 20,887.88 and 8,422.22

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Solution

The fourth proportional to 15,136.58, 20,887.88 and 8,422.22 is: 11,622.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,136.58 : 20,887.88 = 8,422.22 : x
  2. Step 2: Convert to fraction form
    15,136.58/20,887.88 = 8,422.22/x
  3. Step 3: Cross multiply
    15,136.58x = 20,887.88 × 8,422.22
  4. Step 4: Simplify right side
    15,136.58x = 175,922,320.69
  5. Step 5: Solve for x
    x = 175,922,320.69/15,136.58
  6. Step 6: Final answer
    x = 11,622.33

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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.