Home / 20,812.19-28,722.69-11,862.56

Finding the Fourth Proportional to 20,812.19, 28,722.69 and 11,862.56

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Solution

The fourth proportional to 20,812.19, 28,722.69 and 11,862.56 is: 16,371.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.19 : 28,722.69 = 11,862.56 : x
  2. Step 2: Convert to fraction form
    20,812.19/28,722.69 = 11,862.56/x
  3. Step 3: Cross multiply
    20,812.19x = 28,722.69 × 11,862.56
  4. Step 4: Simplify right side
    20,812.19x = 340,724,705.29
  5. Step 5: Solve for x
    x = 340,724,705.29/20,812.19
  6. Step 6: Final answer
    x = 16,371.40

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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.