Home / 12,405.12-17,118.36-6,816.48

Finding the Fourth Proportional to 12,405.12, 17,118.36 and 6,816.48

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Solution

The fourth proportional to 12,405.12, 17,118.36 and 6,816.48 is: 9,406.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.12 : 17,118.36 = 6,816.48 : x
  2. Step 2: Convert to fraction form
    12,405.12/17,118.36 = 6,816.48/x
  3. Step 3: Cross multiply
    12,405.12x = 17,118.36 × 6,816.48
  4. Step 4: Simplify right side
    12,405.12x = 116,686,958.57
  5. Step 5: Solve for x
    x = 116,686,958.57/12,405.12
  6. Step 6: Final answer
    x = 9,406.35

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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.