Home / 13,388.19-18,475.82-7,419.99

Finding the Fourth Proportional to 13,388.19, 18,475.82 and 7,419.99

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Solution

The fourth proportional to 13,388.19, 18,475.82 and 7,419.99 is: 10,239.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.19 : 18,475.82 = 7,419.99 : x
  2. Step 2: Convert to fraction form
    13,388.19/18,475.82 = 7,419.99/x
  3. Step 3: Cross multiply
    13,388.19x = 18,475.82 × 7,419.99
  4. Step 4: Simplify right side
    13,388.19x = 137,090,399.64
  5. Step 5: Solve for x
    x = 137,090,399.64/13,388.19
  6. Step 6: Final answer
    x = 10,239.65

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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.