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Finding the Fourth Proportional to 18,455.62, 25,472.90 and 12,078.51

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Solution

The fourth proportional to 18,455.62, 25,472.90 and 12,078.51 is: 16,671.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,455.62 : 25,472.90 = 12,078.51 : x
  2. Step 2: Convert to fraction form
    18,455.62/25,472.90 = 12,078.51/x
  3. Step 3: Cross multiply
    18,455.62x = 25,472.90 × 12,078.51
  4. Step 4: Simplify right side
    18,455.62x = 307,674,707.58
  5. Step 5: Solve for x
    x = 307,674,707.58/18,455.62
  6. Step 6: Final answer
    x = 16,671.06

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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.