Home / 20,485.68-28,270.62-12,102.18

Finding the Fourth Proportional to 20,485.68, 28,270.62 and 12,102.18

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Solution

The fourth proportional to 20,485.68, 28,270.62 and 12,102.18 is: 16,701.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.68 : 28,270.62 = 12,102.18 : x
  2. Step 2: Convert to fraction form
    20,485.68/28,270.62 = 12,102.18/x
  3. Step 3: Cross multiply
    20,485.68x = 28,270.62 × 12,102.18
  4. Step 4: Simplify right side
    20,485.68x = 342,136,131.95
  5. Step 5: Solve for x
    x = 342,136,131.95/20,485.68
  6. Step 6: Final answer
    x = 16,701.23

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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.