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Finding the Fourth Proportional to 18,409.92, 25,389.36 and 12,040.08

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Solution

The fourth proportional to 18,409.92, 25,389.36 and 12,040.08 is: 16,604.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.92 : 25,389.36 = 12,040.08 : x
  2. Step 2: Convert to fraction form
    18,409.92/25,389.36 = 12,040.08/x
  3. Step 3: Cross multiply
    18,409.92x = 25,389.36 × 12,040.08
  4. Step 4: Simplify right side
    18,409.92x = 305,689,925.55
  5. Step 5: Solve for x
    x = 305,689,925.55/18,409.92
  6. Step 6: Final answer
    x = 16,604.63

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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.