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Finding the Fourth Proportional to 18,461.81, 25,477.31 and 11,392.34

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Solution

The fourth proportional to 18,461.81, 25,477.31 and 11,392.34 is: 15,721.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.81 : 25,477.31 = 11,392.34 : x
  2. Step 2: Convert to fraction form
    18,461.81/25,477.31 = 11,392.34/x
  3. Step 3: Cross multiply
    18,461.81x = 25,477.31 × 11,392.34
  4. Step 4: Simplify right side
    18,461.81x = 290,246,078.90
  5. Step 5: Solve for x
    x = 290,246,078.90/18,461.81
  6. Step 6: Final answer
    x = 15,721.43

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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.