Home / 13,381.47-18,467.60-11,398.59

Finding the Fourth Proportional to 13,381.47, 18,467.60 and 11,398.59

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Solution

The fourth proportional to 13,381.47, 18,467.60 and 11,398.59 is: 15,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.47 : 18,467.60 = 11,398.59 : x
  2. Step 2: Convert to fraction form
    13,381.47/18,467.60 = 11,398.59/x
  3. Step 3: Cross multiply
    13,381.47x = 18,467.60 × 11,398.59
  4. Step 4: Simplify right side
    13,381.47x = 210,504,543.69
  5. Step 5: Solve for x
    x = 210,504,543.69/13,381.47
  6. Step 6: Final answer
    x = 15,731.05

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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.