Home / 27,618.56-38,128.03-21,555.77

Finding the Fourth Proportional to 27,618.56, 38,128.03 and 21,555.77

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Solution

The fourth proportional to 27,618.56, 38,128.03 and 21,555.77 is: 29,758.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,618.56 : 38,128.03 = 21,555.77 : x
  2. Step 2: Convert to fraction form
    27,618.56/38,128.03 = 21,555.77/x
  3. Step 3: Cross multiply
    27,618.56x = 38,128.03 × 21,555.77
  4. Step 4: Simplify right side
    27,618.56x = 821,879,086.66
  5. Step 5: Solve for x
    x = 821,879,086.66/27,618.56
  6. Step 6: Final answer
    x = 29,758.22

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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.