Home / 12,419.28-17,136.36-7,112.88

Finding the Fourth Proportional to 12,419.28, 17,136.36 and 7,112.88

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Solution

The fourth proportional to 12,419.28, 17,136.36 and 7,112.88 is: 9,814.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.28 : 17,136.36 = 7,112.88 : x
  2. Step 2: Convert to fraction form
    12,419.28/17,136.36 = 7,112.88/x
  3. Step 3: Cross multiply
    12,419.28x = 17,136.36 × 7,112.88
  4. Step 4: Simplify right side
    12,419.28x = 121,888,872.32
  5. Step 5: Solve for x
    x = 121,888,872.32/12,419.28
  6. Step 6: Final answer
    x = 9,814.49

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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.