Home / 21,036.35-29,084.85-20,106.87

Finding the Fourth Proportional to 21,036.35, 29,084.85 and 20,106.87

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Solution

The fourth proportional to 21,036.35, 29,084.85 and 20,106.87 is: 27,799.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.35 : 29,084.85 = 20,106.87 : x
  2. Step 2: Convert to fraction form
    21,036.35/29,084.85 = 20,106.87/x
  3. Step 3: Cross multiply
    21,036.35x = 29,084.85 × 20,106.87
  4. Step 4: Simplify right side
    21,036.35x = 584,805,297.92
  5. Step 5: Solve for x
    x = 584,805,297.92/21,036.35
  6. Step 6: Final answer
    x = 27,799.76

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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.