Home / 20,644.77-28,487.82-11,690.55

Finding the Fourth Proportional to 20,644.77, 28,487.82 and 11,690.55

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Solution

The fourth proportional to 20,644.77, 28,487.82 and 11,690.55 is: 16,131.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.77 : 28,487.82 = 11,690.55 : x
  2. Step 2: Convert to fraction form
    20,644.77/28,487.82 = 11,690.55/x
  3. Step 3: Cross multiply
    20,644.77x = 28,487.82 × 11,690.55
  4. Step 4: Simplify right side
    20,644.77x = 333,038,284.10
  5. Step 5: Solve for x
    x = 333,038,284.10/20,644.77
  6. Step 6: Final answer
    x = 16,131.85

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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.