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Finding the Fourth Proportional to 8,683.72, 12,999.66 and 5,913.16

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Solution

The fourth proportional to 8,683.72, 12,999.66 and 5,913.16 is: 8,852.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,683.72 : 12,999.66 = 5,913.16 : x
  2. Step 2: Convert to fraction form
    8,683.72/12,999.66 = 5,913.16/x
  3. Step 3: Cross multiply
    8,683.72x = 12,999.66 × 5,913.16
  4. Step 4: Simplify right side
    8,683.72x = 76,869,069.53
  5. Step 5: Solve for x
    x = 76,869,069.53/8,683.72
  6. Step 6: Final answer
    x = 8,852.09

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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.