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Finding the Fourth Proportional to 12,411.36, 18,612.18 and 5,481

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Solution

The fourth proportional to 12,411.36, 18,612.18 and 5,481 is: 8,219.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,411.36 : 18,612.18 = 5,481 : x
  2. Step 2: Convert to fraction form
    12,411.36/18,612.18 = 5,481/x
  3. Step 3: Cross multiply
    12,411.36x = 18,612.18 × 5,481
  4. Step 4: Simplify right side
    12,411.36x = 102,013,358.58
  5. Step 5: Solve for x
    x = 102,013,358.58/12,411.36
  6. Step 6: Final answer
    x = 8,219.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.