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Finding the Fourth Proportional to 8,865.82, 13,272.99 and 5,156.74

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Solution

The fourth proportional to 8,865.82, 13,272.99 and 5,156.74 is: 7,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.82 : 13,272.99 = 5,156.74 : x
  2. Step 2: Convert to fraction form
    8,865.82/13,272.99 = 5,156.74/x
  3. Step 3: Cross multiply
    8,865.82x = 13,272.99 × 5,156.74
  4. Step 4: Simplify right side
    8,865.82x = 68,445,358.45
  5. Step 5: Solve for x
    x = 68,445,358.45/8,865.82
  6. Step 6: Final answer
    x = 7,720.14

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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.