Home / 19,981.90-27,557.22-12,900.88

Finding the Fourth Proportional to 19,981.90, 27,557.22 and 12,900.88

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Solution

The fourth proportional to 19,981.90, 27,557.22 and 12,900.88 is: 17,791.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.90 : 27,557.22 = 12,900.88 : x
  2. Step 2: Convert to fraction form
    19,981.90/27,557.22 = 12,900.88/x
  3. Step 3: Cross multiply
    19,981.90x = 27,557.22 × 12,900.88
  4. Step 4: Simplify right side
    19,981.90x = 355,512,388.35
  5. Step 5: Solve for x
    x = 355,512,388.35/19,981.90
  6. Step 6: Final answer
    x = 17,791.72

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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.