Home / 20,407.40-28,164.09-11,908.88

Finding the Fourth Proportional to 20,407.40, 28,164.09 and 11,908.88

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Solution

The fourth proportional to 20,407.40, 28,164.09 and 11,908.88 is: 16,435.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.40 : 28,164.09 = 11,908.88 : x
  2. Step 2: Convert to fraction form
    20,407.40/28,164.09 = 11,908.88/x
  3. Step 3: Cross multiply
    20,407.40x = 28,164.09 × 11,908.88
  4. Step 4: Simplify right side
    20,407.40x = 335,402,768.12
  5. Step 5: Solve for x
    x = 335,402,768.12/20,407.40
  6. Step 6: Final answer
    x = 16,435.35

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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.