Home / 21,866.10-30,182.67-12,912.90

Finding the Fourth Proportional to 21,866.10, 30,182.67 and 12,912.90

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Solution

The fourth proportional to 21,866.10, 30,182.67 and 12,912.90 is: 17,824.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.10 : 30,182.67 = 12,912.90 : x
  2. Step 2: Convert to fraction form
    21,866.10/30,182.67 = 12,912.90/x
  3. Step 3: Cross multiply
    21,866.10x = 30,182.67 × 12,912.90
  4. Step 4: Simplify right side
    21,866.10x = 389,745,799.44
  5. Step 5: Solve for x
    x = 389,745,799.44/21,866.10
  6. Step 6: Final answer
    x = 17,824.20

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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.