Home / 21,999.60-32,975.10-12,145.95

Finding the Fourth Proportional to 21,999.60, 32,975.10 and 12,145.95

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Solution

The fourth proportional to 21,999.60, 32,975.10 and 12,145.95 is: 18,205.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.60 : 32,975.10 = 12,145.95 : x
  2. Step 2: Convert to fraction form
    21,999.60/32,975.10 = 12,145.95/x
  3. Step 3: Cross multiply
    21,999.60x = 32,975.10 × 12,145.95
  4. Step 4: Simplify right side
    21,999.60x = 400,513,915.85
  5. Step 5: Solve for x
    x = 400,513,915.85/21,999.60
  6. Step 6: Final answer
    x = 18,205.51

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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.