Home / 18,109.17-25,005.11-12,145.95

Finding the Fourth Proportional to 18,109.17, 25,005.11 and 12,145.95

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Solution

The fourth proportional to 18,109.17, 25,005.11 and 12,145.95 is: 16,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.17 : 25,005.11 = 12,145.95 : x
  2. Step 2: Convert to fraction form
    18,109.17/25,005.11 = 12,145.95/x
  3. Step 3: Cross multiply
    18,109.17x = 25,005.11 × 12,145.95
  4. Step 4: Simplify right side
    18,109.17x = 303,710,755.07
  5. Step 5: Solve for x
    x = 303,710,755.07/18,109.17
  6. Step 6: Final answer
    x = 16,771.10

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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.