Home / 20,888.20-28,825.34-11,813.42

Finding the Fourth Proportional to 20,888.20, 28,825.34 and 11,813.42

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Solution

The fourth proportional to 20,888.20, 28,825.34 and 11,813.42 is: 16,302.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.20 : 28,825.34 = 11,813.42 : x
  2. Step 2: Convert to fraction form
    20,888.20/28,825.34 = 11,813.42/x
  3. Step 3: Cross multiply
    20,888.20x = 28,825.34 × 11,813.42
  4. Step 4: Simplify right side
    20,888.20x = 340,525,848.06
  5. Step 5: Solve for x
    x = 340,525,848.06/20,888.20
  6. Step 6: Final answer
    x = 16,302.31

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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.