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Finding the Fourth Proportional to 12,018.54, 16,561.95 and 9,189.11

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Solution

The fourth proportional to 12,018.54, 16,561.95 and 9,189.11 is: 12,662.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.54 : 16,561.95 = 9,189.11 : x
  2. Step 2: Convert to fraction form
    12,018.54/16,561.95 = 9,189.11/x
  3. Step 3: Cross multiply
    12,018.54x = 16,561.95 × 9,189.11
  4. Step 4: Simplify right side
    12,018.54x = 152,189,580.36
  5. Step 5: Solve for x
    x = 152,189,580.36/12,018.54
  6. Step 6: Final answer
    x = 12,662.90

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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.