Home / 20,850.84-28,774.16-11,419.40

Finding the Fourth Proportional to 20,850.84, 28,774.16 and 11,419.40

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Solution

The fourth proportional to 20,850.84, 28,774.16 and 11,419.40 is: 15,758.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.84 : 28,774.16 = 11,419.40 : x
  2. Step 2: Convert to fraction form
    20,850.84/28,774.16 = 11,419.40/x
  3. Step 3: Cross multiply
    20,850.84x = 28,774.16 × 11,419.40
  4. Step 4: Simplify right side
    20,850.84x = 328,583,642.70
  5. Step 5: Solve for x
    x = 328,583,642.70/20,850.84
  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.