Home / 20,888.31-28,826.10-11,456.67

Finding the Fourth Proportional to 20,888.31, 28,826.10 and 11,456.67

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Solution

The fourth proportional to 20,888.31, 28,826.10 and 11,456.67 is: 15,810.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.31 : 28,826.10 = 11,456.67 : x
  2. Step 2: Convert to fraction form
    20,888.31/28,826.10 = 11,456.67/x
  3. Step 3: Cross multiply
    20,888.31x = 28,826.10 × 11,456.67
  4. Step 4: Simplify right side
    20,888.31x = 330,251,115.09
  5. Step 5: Solve for x
    x = 330,251,115.09/20,888.31
  6. Step 6: Final answer
    x = 15,810.33

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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.