Home / 20,875.11-28,808.82-12,382.26

Finding the Fourth Proportional to 20,875.11, 28,808.82 and 12,382.26

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Solution

The fourth proportional to 20,875.11, 28,808.82 and 12,382.26 is: 17,088.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.11 : 28,808.82 = 12,382.26 : x
  2. Step 2: Convert to fraction form
    20,875.11/28,808.82 = 12,382.26/x
  3. Step 3: Cross multiply
    20,875.11x = 28,808.82 × 12,382.26
  4. Step 4: Simplify right side
    20,875.11x = 356,718,299.53
  5. Step 5: Solve for x
    x = 356,718,299.53/20,875.11
  6. Step 6: Final answer
    x = 17,088.21

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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.