Home / 13,411.61-18,508.83-7,747.40

Finding the Fourth Proportional to 13,411.61, 18,508.83 and 7,747.40

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Solution

The fourth proportional to 13,411.61, 18,508.83 and 7,747.40 is: 10,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.61 : 18,508.83 = 7,747.40 : x
  2. Step 2: Convert to fraction form
    13,411.61/18,508.83 = 7,747.40/x
  3. Step 3: Cross multiply
    13,411.61x = 18,508.83 × 7,747.40
  4. Step 4: Simplify right side
    13,411.61x = 143,395,309.54
  5. Step 5: Solve for x
    x = 143,395,309.54/13,411.61
  6. Step 6: Final answer
    x = 10,691.88

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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.