Home / 21,911.74-30,238.17-12,963.64

Finding the Fourth Proportional to 21,911.74, 30,238.17 and 12,963.64

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Solution

The fourth proportional to 21,911.74, 30,238.17 and 12,963.64 is: 17,889.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.74 : 30,238.17 = 12,963.64 : x
  2. Step 2: Convert to fraction form
    21,911.74/30,238.17 = 12,963.64/x
  3. Step 3: Cross multiply
    21,911.74x = 30,238.17 × 12,963.64
  4. Step 4: Simplify right side
    21,911.74x = 391,996,750.14
  5. Step 5: Solve for x
    x = 391,996,750.14/21,911.74
  6. Step 6: Final answer
    x = 17,889.80

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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.