Home / 20,873.19-28,800.75-12,371.57

Finding the Fourth Proportional to 20,873.19, 28,800.75 and 12,371.57

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Solution

The fourth proportional to 20,873.19, 28,800.75 and 12,371.57 is: 17,070.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.19 : 28,800.75 = 12,371.57 : x
  2. Step 2: Convert to fraction form
    20,873.19/28,800.75 = 12,371.57/x
  3. Step 3: Cross multiply
    20,873.19x = 28,800.75 × 12,371.57
  4. Step 4: Simplify right side
    20,873.19x = 356,310,494.68
  5. Step 5: Solve for x
    x = 356,310,494.68/20,873.19
  6. Step 6: Final answer
    x = 17,070.25

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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.