Home / 21,891.74-30,203.58-12,942.25

Finding the Fourth Proportional to 21,891.74, 30,203.58 and 12,942.25

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Solution

The fourth proportional to 21,891.74, 30,203.58 and 12,942.25 is: 17,856.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.74 : 30,203.58 = 12,942.25 : x
  2. Step 2: Convert to fraction form
    21,891.74/30,203.58 = 12,942.25/x
  3. Step 3: Cross multiply
    21,891.74x = 30,203.58 × 12,942.25
  4. Step 4: Simplify right side
    21,891.74x = 390,902,256.28
  5. Step 5: Solve for x
    x = 390,902,256.28/21,891.74
  6. Step 6: Final answer
    x = 17,856.16

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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.