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Finding the Fourth Proportional to 10,579.26, 15,856.86 and 8,221.74

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Solution

The fourth proportional to 10,579.26, 15,856.86 and 8,221.74 is: 12,323.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,579.26 : 15,856.86 = 8,221.74 : x
  2. Step 2: Convert to fraction form
    10,579.26/15,856.86 = 8,221.74/x
  3. Step 3: Cross multiply
    10,579.26x = 15,856.86 × 8,221.74
  4. Step 4: Simplify right side
    10,579.26x = 130,370,980.14
  5. Step 5: Solve for x
    x = 130,370,980.14/10,579.26
  6. Step 6: Final answer
    x = 12,323.26

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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.