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Finding the Fourth Proportional to 38,405.93, 52,995.89 and 21,408.89

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Solution

The fourth proportional to 38,405.93, 52,995.89 and 21,408.89 is: 29,541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,405.93 : 52,995.89 = 21,408.89 : x
  2. Step 2: Convert to fraction form
    38,405.93/52,995.89 = 21,408.89/x
  3. Step 3: Cross multiply
    38,405.93x = 52,995.89 × 21,408.89
  4. Step 4: Simplify right side
    38,405.93x = 1,134,583,179.46
  5. Step 5: Solve for x
    x = 1,134,583,179.46/38,405.93
  6. Step 6: Final answer
    x = 29,541.87

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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.