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Finding the Fourth Proportional to 18,019.10, 27,008.40 and 8,663.60

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Solution

The fourth proportional to 18,019.10, 27,008.40 and 8,663.60 is: 12,985.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,019.10 : 27,008.40 = 8,663.60 : x
  2. Step 2: Convert to fraction form
    18,019.10/27,008.40 = 8,663.60/x
  3. Step 3: Cross multiply
    18,019.10x = 27,008.40 × 8,663.60
  4. Step 4: Simplify right side
    18,019.10x = 233,989,974.24
  5. Step 5: Solve for x
    x = 233,989,974.24/18,019.10
  6. Step 6: Final answer
    x = 12,985.66

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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.