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Finding the Fourth Proportional to 38,881, 53,660.51 and 21,891.61

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Solution

The fourth proportional to 38,881, 53,660.51 and 21,891.61 is: 30,213.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,881 : 53,660.51 = 21,891.61 : x
  2. Step 2: Convert to fraction form
    38,881/53,660.51 = 21,891.61/x
  3. Step 3: Cross multiply
    38,881x = 53,660.51 × 21,891.61
  4. Step 4: Simplify right side
    38,881x = 1,174,714,847.86
  5. Step 5: Solve for x
    x = 1,174,714,847.86/38,881
  6. Step 6: Final answer
    x = 30,213.08

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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.