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Finding the Fourth Proportional to 8,709.87, 12,018.06 and 5,173.95

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Solution

The fourth proportional to 8,709.87, 12,018.06 and 5,173.95 is: 7,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.87 : 12,018.06 = 5,173.95 : x
  2. Step 2: Convert to fraction form
    8,709.87/12,018.06 = 5,173.95/x
  3. Step 3: Cross multiply
    8,709.87x = 12,018.06 × 5,173.95
  4. Step 4: Simplify right side
    8,709.87x = 62,180,841.54
  5. Step 5: Solve for x
    x = 62,180,841.54/8,709.87
  6. Step 6: Final answer
    x = 7,139.12

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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.