Home / 8,905.62-13,336.56-7,138.20

Finding the Fourth Proportional to 8,905.62, 13,336.56 and 7,138.20

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Solution

The fourth proportional to 8,905.62, 13,336.56 and 7,138.20 is: 10,689.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.62 : 13,336.56 = 7,138.20 : x
  2. Step 2: Convert to fraction form
    8,905.62/13,336.56 = 7,138.20/x
  3. Step 3: Cross multiply
    8,905.62x = 13,336.56 × 7,138.20
  4. Step 4: Simplify right side
    8,905.62x = 95,199,032.59
  5. Step 5: Solve for x
    x = 95,199,032.59/8,905.62
  6. Step 6: Final answer
    x = 10,689.77

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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.