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Finding the Fourth Proportional to 18,493.21, 25,531.92 and 12,038.99

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Solution

The fourth proportional to 18,493.21, 25,531.92 and 12,038.99 is: 16,621.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,493.21 : 25,531.92 = 12,038.99 : x
  2. Step 2: Convert to fraction form
    18,493.21/25,531.92 = 12,038.99/x
  3. Step 3: Cross multiply
    18,493.21x = 25,531.92 × 12,038.99
  4. Step 4: Simplify right side
    18,493.21x = 307,378,593.39
  5. Step 5: Solve for x
    x = 307,378,593.39/18,493.21
  6. Step 6: Final answer
    x = 16,621.16

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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.