Home / 20,199.40-27,870.42-12,239.80

Finding the Fourth Proportional to 20,199.40, 27,870.42 and 12,239.80

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Solution

The fourth proportional to 20,199.40, 27,870.42 and 12,239.80 is: 16,888.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,199.40 : 27,870.42 = 12,239.80 : x
  2. Step 2: Convert to fraction form
    20,199.40/27,870.42 = 12,239.80/x
  3. Step 3: Cross multiply
    20,199.40x = 27,870.42 × 12,239.80
  4. Step 4: Simplify right side
    20,199.40x = 341,128,366.72
  5. Step 5: Solve for x
    x = 341,128,366.72/20,199.40
  6. Step 6: Final answer
    x = 16,888.04

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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.