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Finding the Fourth Proportional to 38,389.50, 52,977.60 and 21,622.50

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Solution

The fourth proportional to 38,389.50, 52,977.60 and 21,622.50 is: 29,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,389.50 : 52,977.60 = 21,622.50 : x
  2. Step 2: Convert to fraction form
    38,389.50/52,977.60 = 21,622.50/x
  3. Step 3: Cross multiply
    38,389.50x = 52,977.60 × 21,622.50
  4. Step 4: Simplify right side
    38,389.50x = 1,145,508,156
  5. Step 5: Solve for x
    x = 1,145,508,156/38,389.50
  6. Step 6: Final answer
    x = 29,839.10

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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.