Home / 12,398.28-17,104.68-7,920.87

Finding the Fourth Proportional to 12,398.28, 17,104.68 and 7,920.87

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Solution

The fourth proportional to 12,398.28, 17,104.68 and 7,920.87 is: 10,927.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.28 : 17,104.68 = 7,920.87 : x
  2. Step 2: Convert to fraction form
    12,398.28/17,104.68 = 7,920.87/x
  3. Step 3: Cross multiply
    12,398.28x = 17,104.68 × 7,920.87
  4. Step 4: Simplify right side
    12,398.28x = 135,483,946.67
  5. Step 5: Solve for x
    x = 135,483,946.67/12,398.28
  6. Step 6: Final answer
    x = 10,927.64

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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.