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Finding the Fourth Proportional to 9,072, 12,480.48 and 8,683.20

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Solution

The fourth proportional to 9,072, 12,480.48 and 8,683.20 is: 11,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,072 : 12,480.48 = 8,683.20 : x
  2. Step 2: Convert to fraction form
    9,072/12,480.48 = 8,683.20/x
  3. Step 3: Cross multiply
    9,072x = 12,480.48 × 8,683.20
  4. Step 4: Simplify right side
    9,072x = 108,370,503.94
  5. Step 5: Solve for x
    x = 108,370,503.94/9,072
  6. Step 6: Final answer
    x = 11,945.60

Related Problems

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Double scale
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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.