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Finding the Fourth Proportional to 18,625.40, 27,938.10 and 4,774.40

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Solution

The fourth proportional to 18,625.40, 27,938.10 and 4,774.40 is: 7,161.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,625.40 : 27,938.10 = 4,774.40 : x
  2. Step 2: Convert to fraction form
    18,625.40/27,938.10 = 4,774.40/x
  3. Step 3: Cross multiply
    18,625.40x = 27,938.10 × 4,774.40
  4. Step 4: Simplify right side
    18,625.40x = 133,387,664.64
  5. Step 5: Solve for x
    x = 133,387,664.64/18,625.40
  6. Step 6: Final answer
    x = 7,161.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.