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Finding the Fourth Proportional to 38,711.80, 53,408.44 and 21,944.80

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Solution

The fourth proportional to 38,711.80, 53,408.44 and 21,944.80 is: 30,275.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,711.80 : 53,408.44 = 21,944.80 : x
  2. Step 2: Convert to fraction form
    38,711.80/53,408.44 = 21,944.80/x
  3. Step 3: Cross multiply
    38,711.80x = 53,408.44 × 21,944.80
  4. Step 4: Simplify right side
    38,711.80x = 1,172,037,534.11
  5. Step 5: Solve for x
    x = 1,172,037,534.11/38,711.80
  6. Step 6: Final answer
    x = 30,275.98

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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.