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Finding the Fourth Proportional to 8,698.39, 12,005.01 and 5,722.85

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Solution

The fourth proportional to 8,698.39, 12,005.01 and 5,722.85 is: 7,898.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,698.39 : 12,005.01 = 5,722.85 : x
  2. Step 2: Convert to fraction form
    8,698.39/12,005.01 = 5,722.85/x
  3. Step 3: Cross multiply
    8,698.39x = 12,005.01 × 5,722.85
  4. Step 4: Simplify right side
    8,698.39x = 68,702,901.49
  5. Step 5: Solve for x
    x = 68,702,901.49/8,698.39
  6. Step 6: Final answer
    x = 7,898.35

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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.