Home / 20,690.67-28,553.13-11,259.23

Finding the Fourth Proportional to 20,690.67, 28,553.13 and 11,259.23

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Solution

The fourth proportional to 20,690.67, 28,553.13 and 11,259.23 is: 15,537.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.67 : 28,553.13 = 11,259.23 : x
  2. Step 2: Convert to fraction form
    20,690.67/28,553.13 = 11,259.23/x
  3. Step 3: Cross multiply
    20,690.67x = 28,553.13 × 11,259.23
  4. Step 4: Simplify right side
    20,690.67x = 321,486,257.89
  5. Step 5: Solve for x
    x = 321,486,257.89/20,690.67
  6. Step 6: Final answer
    x = 15,537.74

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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.