Home / 21,122.62-29,137.52-13,560.46

Finding the Fourth Proportional to 21,122.62, 29,137.52 and 13,560.46

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Solution

The fourth proportional to 21,122.62, 29,137.52 and 13,560.46 is: 18,705.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.62 : 29,137.52 = 13,560.46 : x
  2. Step 2: Convert to fraction form
    21,122.62/29,137.52 = 13,560.46/x
  3. Step 3: Cross multiply
    21,122.62x = 29,137.52 × 13,560.46
  4. Step 4: Simplify right side
    21,122.62x = 395,118,299.42
  5. Step 5: Solve for x
    x = 395,118,299.42/21,122.62
  6. Step 6: Final answer
    x = 18,705.93

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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.