Home / 21,135.61-29,173.55-12,188.96

Finding the Fourth Proportional to 21,135.61, 29,173.55 and 12,188.96

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Solution

The fourth proportional to 21,135.61, 29,173.55 and 12,188.96 is: 16,824.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.61 : 29,173.55 = 12,188.96 : x
  2. Step 2: Convert to fraction form
    21,135.61/29,173.55 = 12,188.96/x
  3. Step 3: Cross multiply
    21,135.61x = 29,173.55 × 12,188.96
  4. Step 4: Simplify right side
    21,135.61x = 355,595,174.53
  5. Step 5: Solve for x
    x = 355,595,174.53/21,135.61
  6. Step 6: Final answer
    x = 16,824.46

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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.