Home / 12,477.30-17,218.78-6,812.16

Finding the Fourth Proportional to 12,477.30, 17,218.78 and 6,812.16

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Solution

The fourth proportional to 12,477.30, 17,218.78 and 6,812.16 is: 9,400.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,477.30 : 17,218.78 = 6,812.16 : x
  2. Step 2: Convert to fraction form
    12,477.30/17,218.78 = 6,812.16/x
  3. Step 3: Cross multiply
    12,477.30x = 17,218.78 × 6,812.16
  4. Step 4: Simplify right side
    12,477.30x = 117,297,084.36
  5. Step 5: Solve for x
    x = 117,297,084.36/12,477.30
  6. Step 6: Final answer
    x = 9,400.84

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.