Home / 21,995.20-32,992.80-12,129.40

Finding the Fourth Proportional to 21,995.20, 32,992.80 and 12,129.40

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Solution

The fourth proportional to 21,995.20, 32,992.80 and 12,129.40 is: 18,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.20 : 32,992.80 = 12,129.40 : x
  2. Step 2: Convert to fraction form
    21,995.20/32,992.80 = 12,129.40/x
  3. Step 3: Cross multiply
    21,995.20x = 32,992.80 × 12,129.40
  4. Step 4: Simplify right side
    21,995.20x = 400,182,868.32
  5. Step 5: Solve for x
    x = 400,182,868.32/21,995.20
  6. Step 6: Final answer
    x = 18,194.10

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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.