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Finding the Fourth Proportional to 38,320.90, 52,884.57 and 21,553.90

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Solution

The fourth proportional to 38,320.90, 52,884.57 and 21,553.90 is: 29,745.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,320.90 : 52,884.57 = 21,553.90 : x
  2. Step 2: Convert to fraction form
    38,320.90/52,884.57 = 21,553.90/x
  3. Step 3: Cross multiply
    38,320.90x = 52,884.57 × 21,553.90
  4. Step 4: Simplify right side
    38,320.90x = 1,139,868,733.32
  5. Step 5: Solve for x
    x = 1,139,868,733.32/38,320.90
  6. Step 6: Final answer
    x = 29,745.35

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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.