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Finding the Fourth Proportional to 8,615.64, 12,925.62 and 2,772.12

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Solution

The fourth proportional to 8,615.64, 12,925.62 and 2,772.12 is: 4,158.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.64 : 12,925.62 = 2,772.12 : x
  2. Step 2: Convert to fraction form
    8,615.64/12,925.62 = 2,772.12/x
  3. Step 3: Cross multiply
    8,615.64x = 12,925.62 × 2,772.12
  4. Step 4: Simplify right side
    8,615.64x = 35,831,369.71
  5. Step 5: Solve for x
    x = 35,831,369.71/8,615.64
  6. Step 6: Final answer
    x = 4,158.87

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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.