Home / 21,416.40-32,124.60-18,135.90

Finding the Fourth Proportional to 21,416.40, 32,124.60 and 18,135.90

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Solution

The fourth proportional to 21,416.40, 32,124.60 and 18,135.90 is: 27,203.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.40 : 32,124.60 = 18,135.90 : x
  2. Step 2: Convert to fraction form
    21,416.40/32,124.60 = 18,135.90/x
  3. Step 3: Cross multiply
    21,416.40x = 32,124.60 × 18,135.90
  4. Step 4: Simplify right side
    21,416.40x = 582,608,533.14
  5. Step 5: Solve for x
    x = 582,608,533.14/21,416.40
  6. Step 6: Final answer
    x = 27,203.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.