Home / 12,405.24-17,119.50-6,816.60

Finding the Fourth Proportional to 12,405.24, 17,119.50 and 6,816.60

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Solution

The fourth proportional to 12,405.24, 17,119.50 and 6,816.60 is: 9,407.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.24 : 17,119.50 = 6,816.60 : x
  2. Step 2: Convert to fraction form
    12,405.24/17,119.50 = 6,816.60/x
  3. Step 3: Cross multiply
    12,405.24x = 17,119.50 × 6,816.60
  4. Step 4: Simplify right side
    12,405.24x = 116,696,783.70
  5. Step 5: Solve for x
    x = 116,696,783.70/12,405.24
  6. Step 6: Final answer
    x = 9,407.06

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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.