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Finding the Fourth Proportional to 12,492.12, 18,712.44 and 7,549.32

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Solution

The fourth proportional to 12,492.12, 18,712.44 and 7,549.32 is: 11,308.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.12 : 18,712.44 = 7,549.32 : x
  2. Step 2: Convert to fraction form
    12,492.12/18,712.44 = 7,549.32/x
  3. Step 3: Cross multiply
    12,492.12x = 18,712.44 × 7,549.32
  4. Step 4: Simplify right side
    12,492.12x = 141,266,197.54
  5. Step 5: Solve for x
    x = 141,266,197.54/12,492.12
  6. Step 6: Final answer
    x = 11,308.42

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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.