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Finding the Fourth Proportional to 18,810.99, 25,946.73 and 12,105.09

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Solution

The fourth proportional to 18,810.99, 25,946.73 and 12,105.09 is: 16,697.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.99 : 25,946.73 = 12,105.09 : x
  2. Step 2: Convert to fraction form
    18,810.99/25,946.73 = 12,105.09/x
  3. Step 3: Cross multiply
    18,810.99x = 25,946.73 × 12,105.09
  4. Step 4: Simplify right side
    18,810.99x = 314,087,501.86
  5. Step 5: Solve for x
    x = 314,087,501.86/18,810.99
  6. Step 6: Final answer
    x = 16,697.02

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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.