Home / 13,388.31-18,475.20-7,419.93

Finding the Fourth Proportional to 13,388.31, 18,475.20 and 7,419.93

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Solution

The fourth proportional to 13,388.31, 18,475.20 and 7,419.93 is: 10,239.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.31 : 18,475.20 = 7,419.93 : x
  2. Step 2: Convert to fraction form
    13,388.31/18,475.20 = 7,419.93/x
  3. Step 3: Cross multiply
    13,388.31x = 18,475.20 × 7,419.93
  4. Step 4: Simplify right side
    13,388.31x = 137,084,621.45
  5. Step 5: Solve for x
    x = 137,084,621.45/13,388.31
  6. Step 6: Final answer
    x = 10,239.13

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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.