Home / 12,905.28-17,811.36-7,318.08

Finding the Fourth Proportional to 12,905.28, 17,811.36 and 7,318.08

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Solution

The fourth proportional to 12,905.28, 17,811.36 and 7,318.08 is: 10,100.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.28 : 17,811.36 = 7,318.08 : x
  2. Step 2: Convert to fraction form
    12,905.28/17,811.36 = 7,318.08/x
  3. Step 3: Cross multiply
    12,905.28x = 17,811.36 × 7,318.08
  4. Step 4: Simplify right side
    12,905.28x = 130,344,957.39
  5. Step 5: Solve for x
    x = 130,344,957.39/12,905.28
  6. Step 6: Final answer
    x = 10,100.13

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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.