Home / 21,891.44-30,204.63-13,390.47

Finding the Fourth Proportional to 21,891.44, 30,204.63 and 13,390.47

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Solution

The fourth proportional to 21,891.44, 30,204.63 and 13,390.47 is: 18,475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.44 : 30,204.63 = 13,390.47 : x
  2. Step 2: Convert to fraction form
    21,891.44/30,204.63 = 13,390.47/x
  3. Step 3: Cross multiply
    21,891.44x = 30,204.63 × 13,390.47
  4. Step 4: Simplify right side
    21,891.44x = 404,454,191.88
  5. Step 5: Solve for x
    x = 404,454,191.88/21,891.44
  6. Step 6: Final answer
    x = 18,475.45

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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.