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Finding the Fourth Proportional to 18,275.09, 25,220.09 and 11,205.41

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Solution

The fourth proportional to 18,275.09, 25,220.09 and 11,205.41 is: 15,463.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.09 : 25,220.09 = 11,205.41 : x
  2. Step 2: Convert to fraction form
    18,275.09/25,220.09 = 11,205.41/x
  3. Step 3: Cross multiply
    18,275.09x = 25,220.09 × 11,205.41
  4. Step 4: Simplify right side
    18,275.09x = 282,601,448.69
  5. Step 5: Solve for x
    x = 282,601,448.69/18,275.09
  6. Step 6: Final answer
    x = 15,463.75

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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.