Home / 20,886.95-28,823.61-11,812.17

Finding the Fourth Proportional to 20,886.95, 28,823.61 and 11,812.17

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Solution

The fourth proportional to 20,886.95, 28,823.61 and 11,812.17 is: 16,300.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.95 : 28,823.61 = 11,812.17 : x
  2. Step 2: Convert to fraction form
    20,886.95/28,823.61 = 11,812.17/x
  3. Step 3: Cross multiply
    20,886.95x = 28,823.61 × 11,812.17
  4. Step 4: Simplify right side
    20,886.95x = 340,469,381.33
  5. Step 5: Solve for x
    x = 340,469,381.33/20,886.95
  6. Step 6: Final answer
    x = 16,300.58

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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.