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Finding the Fourth Proportional to 18,775.66, 25,908.66 and 11,220.49

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Solution

The fourth proportional to 18,775.66, 25,908.66 and 11,220.49 is: 15,483.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,775.66 : 25,908.66 = 11,220.49 : x
  2. Step 2: Convert to fraction form
    18,775.66/25,908.66 = 11,220.49/x
  3. Step 3: Cross multiply
    18,775.66x = 25,908.66 × 11,220.49
  4. Step 4: Simplify right side
    18,775.66x = 290,707,804.34
  5. Step 5: Solve for x
    x = 290,707,804.34/18,775.66
  6. Step 6: Final answer
    x = 15,483.23

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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.