Home / 20,686.25-28,549.13-12,191.01

Finding the Fourth Proportional to 20,686.25, 28,549.13 and 12,191.01

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Solution

The fourth proportional to 20,686.25, 28,549.13 and 12,191.01 is: 16,824.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.25 : 28,549.13 = 12,191.01 : x
  2. Step 2: Convert to fraction form
    20,686.25/28,549.13 = 12,191.01/x
  3. Step 3: Cross multiply
    20,686.25x = 28,549.13 × 12,191.01
  4. Step 4: Simplify right side
    20,686.25x = 348,042,668.37
  5. Step 5: Solve for x
    x = 348,042,668.37/20,686.25
  6. Step 6: Final answer
    x = 16,824.84

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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.