Home / 13,388.17-18,475.40-7,419.79

Finding the Fourth Proportional to 13,388.17, 18,475.40 and 7,419.79

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Solution

The fourth proportional to 13,388.17, 18,475.40 and 7,419.79 is: 10,239.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.17 : 18,475.40 = 7,419.79 : x
  2. Step 2: Convert to fraction form
    13,388.17/18,475.40 = 7,419.79/x
  3. Step 3: Cross multiply
    13,388.17x = 18,475.40 × 7,419.79
  4. Step 4: Simplify right side
    13,388.17x = 137,083,588.17
  5. Step 5: Solve for x
    x = 137,083,588.17/13,388.17
  6. Step 6: Final answer
    x = 10,239.16

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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.