Home / 21,868.44-30,178.17-12,308.28

Finding the Fourth Proportional to 21,868.44, 30,178.17 and 12,308.28

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Solution

The fourth proportional to 21,868.44, 30,178.17 and 12,308.28 is: 16,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.44 : 30,178.17 = 12,308.28 : x
  2. Step 2: Convert to fraction form
    21,868.44/30,178.17 = 12,308.28/x
  3. Step 3: Cross multiply
    21,868.44x = 30,178.17 × 12,308.28
  4. Step 4: Simplify right side
    21,868.44x = 371,441,366.25
  5. Step 5: Solve for x
    x = 371,441,366.25/21,868.44
  6. Step 6: Final answer
    x = 16,985.27

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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.