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Finding the Fourth Proportional to 8,376.16, 12,564.24 and 3,980.28

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Solution

The fourth proportional to 8,376.16, 12,564.24 and 3,980.28 is: 5,970.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,376.16 : 12,564.24 = 3,980.28 : x
  2. Step 2: Convert to fraction form
    8,376.16/12,564.24 = 3,980.28/x
  3. Step 3: Cross multiply
    8,376.16x = 12,564.24 × 3,980.28
  4. Step 4: Simplify right side
    8,376.16x = 50,009,193.19
  5. Step 5: Solve for x
    x = 50,009,193.19/8,376.16
  6. Step 6: Final answer
    x = 5,970.42

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Double scale
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Similar ratio
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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.