Home / 12,419.28-17,138.70-6,830.28

Finding the Fourth Proportional to 12,419.28, 17,138.70 and 6,830.28

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Solution

The fourth proportional to 12,419.28, 17,138.70 and 6,830.28 is: 9,425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.28 : 17,138.70 = 6,830.28 : x
  2. Step 2: Convert to fraction form
    12,419.28/17,138.70 = 6,830.28/x
  3. Step 3: Cross multiply
    12,419.28x = 17,138.70 × 6,830.28
  4. Step 4: Simplify right side
    12,419.28x = 117,062,119.84
  5. Step 5: Solve for x
    x = 117,062,119.84/12,419.28
  6. Step 6: Final answer
    x = 9,425.84

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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.