Home / 21,891.20-30,208.14-12,330.56

Finding the Fourth Proportional to 21,891.20, 30,208.14 and 12,330.56

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Solution

The fourth proportional to 21,891.20, 30,208.14 and 12,330.56 is: 17,015.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.20 : 30,208.14 = 12,330.56 : x
  2. Step 2: Convert to fraction form
    21,891.20/30,208.14 = 12,330.56/x
  3. Step 3: Cross multiply
    21,891.20x = 30,208.14 × 12,330.56
  4. Step 4: Simplify right side
    21,891.20x = 372,483,358.28
  5. Step 5: Solve for x
    x = 372,483,358.28/21,891.20
  6. Step 6: Final answer
    x = 17,015.21

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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.