Home / 20,564.67-28,379.07-11,133.15

Finding the Fourth Proportional to 20,564.67, 28,379.07 and 11,133.15

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Solution

The fourth proportional to 20,564.67, 28,379.07 and 11,133.15 is: 15,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.67 : 28,379.07 = 11,133.15 : x
  2. Step 2: Convert to fraction form
    20,564.67/28,379.07 = 11,133.15/x
  3. Step 3: Cross multiply
    20,564.67x = 28,379.07 × 11,133.15
  4. Step 4: Simplify right side
    20,564.67x = 315,948,443.17
  5. Step 5: Solve for x
    x = 315,948,443.17/20,564.67
  6. Step 6: Final answer
    x = 15,363.65

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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.