Home / 13,318.68-18,380.40-7,351.20

Finding the Fourth Proportional to 13,318.68, 18,380.40 and 7,351.20

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Solution

The fourth proportional to 13,318.68, 18,380.40 and 7,351.20 is: 10,145.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.68 : 18,380.40 = 7,351.20 : x
  2. Step 2: Convert to fraction form
    13,318.68/18,380.40 = 7,351.20/x
  3. Step 3: Cross multiply
    13,318.68x = 18,380.40 × 7,351.20
  4. Step 4: Simplify right side
    13,318.68x = 135,117,996.48
  5. Step 5: Solve for x
    x = 135,117,996.48/13,318.68
  6. Step 6: Final answer
    x = 10,145.00

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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.