Home / 20,888.10-28,825.38-11,456.70

Finding the Fourth Proportional to 20,888.10, 28,825.38 and 11,456.70

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Solution

The fourth proportional to 20,888.10, 28,825.38 and 11,456.70 is: 15,810.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.10 : 28,825.38 = 11,456.70 : x
  2. Step 2: Convert to fraction form
    20,888.10/28,825.38 = 11,456.70/x
  3. Step 3: Cross multiply
    20,888.10x = 28,825.38 × 11,456.70
  4. Step 4: Simplify right side
    20,888.10x = 330,243,731.05
  5. Step 5: Solve for x
    x = 330,243,731.05/20,888.10
  6. Step 6: Final answer
    x = 15,810.14

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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.