Home / 28,301.15-38,993.98-21,128.24

Finding the Fourth Proportional to 28,301.15, 38,993.98 and 21,128.24

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Solution

The fourth proportional to 28,301.15, 38,993.98 and 21,128.24 is: 29,110.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,301.15 : 38,993.98 = 21,128.24 : x
  2. Step 2: Convert to fraction form
    28,301.15/38,993.98 = 21,128.24/x
  3. Step 3: Cross multiply
    28,301.15x = 38,993.98 × 21,128.24
  4. Step 4: Simplify right side
    28,301.15x = 823,874,311.70
  5. Step 5: Solve for x
    x = 823,874,311.70/28,301.15
  6. Step 6: Final answer
    x = 29,110.99

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Double scale
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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.