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Finding the Fourth Proportional to 18,605.32, 28,018.03 and 13,447.24

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Solution

The fourth proportional to 18,605.32, 28,018.03 and 13,447.24 is: 20,250.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.32 : 28,018.03 = 13,447.24 : x
  2. Step 2: Convert to fraction form
    18,605.32/28,018.03 = 13,447.24/x
  3. Step 3: Cross multiply
    18,605.32x = 28,018.03 × 13,447.24
  4. Step 4: Simplify right side
    18,605.32x = 376,765,173.74
  5. Step 5: Solve for x
    x = 376,765,173.74/18,605.32
  6. Step 6: Final answer
    x = 20,250.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.