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Finding the Fourth Proportional to 8,615.15, 12,922.42 and 2,459.15

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Solution

The fourth proportional to 8,615.15, 12,922.42 and 2,459.15 is: 3,688.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.15 : 12,922.42 = 2,459.15 : x
  2. Step 2: Convert to fraction form
    8,615.15/12,922.42 = 2,459.15/x
  3. Step 3: Cross multiply
    8,615.15x = 12,922.42 × 2,459.15
  4. Step 4: Simplify right side
    8,615.15x = 31,778,169.14
  5. Step 5: Solve for x
    x = 31,778,169.14/8,615.15
  6. Step 6: Final answer
    x = 3,688.64

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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.