Home / 12,419.07-17,138.28-7,113.88

Finding the Fourth Proportional to 12,419.07, 17,138.28 and 7,113.88

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Solution

The fourth proportional to 12,419.07, 17,138.28 and 7,113.88 is: 9,817.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.07 : 17,138.28 = 7,113.88 : x
  2. Step 2: Convert to fraction form
    12,419.07/17,138.28 = 7,113.88/x
  3. Step 3: Cross multiply
    12,419.07x = 17,138.28 × 7,113.88
  4. Step 4: Simplify right side
    12,419.07x = 121,919,667.33
  5. Step 5: Solve for x
    x = 121,919,667.33/12,419.07
  6. Step 6: Final answer
    x = 9,817.13

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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.