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Finding the Fourth Proportional to 8,107.56, 12,162.69 and 4,985.55

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Solution

The fourth proportional to 8,107.56, 12,162.69 and 4,985.55 is: 7,479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,107.56 : 12,162.69 = 4,985.55 : x
  2. Step 2: Convert to fraction form
    8,107.56/12,162.69 = 4,985.55/x
  3. Step 3: Cross multiply
    8,107.56x = 12,162.69 × 4,985.55
  4. Step 4: Simplify right side
    8,107.56x = 60,637,699.13
  5. Step 5: Solve for x
    x = 60,637,699.13/8,107.56
  6. Step 6: Final answer
    x = 7,479.16

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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.