Home / 20,850.50-28,773.69-11,419.40

Finding the Fourth Proportional to 20,850.50, 28,773.69 and 11,419.40

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Solution

The fourth proportional to 20,850.50, 28,773.69 and 11,419.40 is: 15,758.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.50 : 28,773.69 = 11,419.40 : x
  2. Step 2: Convert to fraction form
    20,850.50/28,773.69 = 11,419.40/x
  3. Step 3: Cross multiply
    20,850.50x = 28,773.69 × 11,419.40
  4. Step 4: Simplify right side
    20,850.50x = 328,578,275.59
  5. Step 5: Solve for x
    x = 328,578,275.59/20,850.50
  6. Step 6: Final answer
    x = 15,758.77

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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.