Home / 21,912.97-30,242.02-12,963.35

Finding the Fourth Proportional to 21,912.97, 30,242.02 and 12,963.35

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Solution

The fourth proportional to 21,912.97, 30,242.02 and 12,963.35 is: 17,890.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.97 : 30,242.02 = 12,963.35 : x
  2. Step 2: Convert to fraction form
    21,912.97/30,242.02 = 12,963.35/x
  3. Step 3: Cross multiply
    21,912.97x = 30,242.02 × 12,963.35
  4. Step 4: Simplify right side
    21,912.97x = 392,037,933.16
  5. Step 5: Solve for x
    x = 392,037,933.16/21,912.97
  6. Step 6: Final answer
    x = 17,890.68

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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.