Home / 21,388.53-29,517.29-12,893.35

Finding the Fourth Proportional to 21,388.53, 29,517.29 and 12,893.35

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Solution

The fourth proportional to 21,388.53, 29,517.29 and 12,893.35 is: 17,793.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.53 : 29,517.29 = 12,893.35 : x
  2. Step 2: Convert to fraction form
    21,388.53/29,517.29 = 12,893.35/x
  3. Step 3: Cross multiply
    21,388.53x = 29,517.29 × 12,893.35
  4. Step 4: Simplify right side
    21,388.53x = 380,576,709.46
  5. Step 5: Solve for x
    x = 380,576,709.46/21,388.53
  6. Step 6: Final answer
    x = 17,793.50

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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.