Home / 20,451.11-28,222.36-12,902.31

Finding the Fourth Proportional to 20,451.11, 28,222.36 and 12,902.31

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Solution

The fourth proportional to 20,451.11, 28,222.36 and 12,902.31 is: 17,805.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.11 : 28,222.36 = 12,902.31 : x
  2. Step 2: Convert to fraction form
    20,451.11/28,222.36 = 12,902.31/x
  3. Step 3: Cross multiply
    20,451.11x = 28,222.36 × 12,902.31
  4. Step 4: Simplify right side
    20,451.11x = 364,133,637.65
  5. Step 5: Solve for x
    x = 364,133,637.65/20,451.11
  6. Step 6: Final answer
    x = 17,805.08

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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.