Home / 13,370.64-18,456.33-7,781.64

Finding the Fourth Proportional to 13,370.64, 18,456.33 and 7,781.64

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Solution

The fourth proportional to 13,370.64, 18,456.33 and 7,781.64 is: 10,741.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,370.64 : 18,456.33 = 7,781.64 : x
  2. Step 2: Convert to fraction form
    13,370.64/18,456.33 = 7,781.64/x
  3. Step 3: Cross multiply
    13,370.64x = 18,456.33 × 7,781.64
  4. Step 4: Simplify right side
    13,370.64x = 143,620,515.78
  5. Step 5: Solve for x
    x = 143,620,515.78/13,370.64
  6. Step 6: Final answer
    x = 10,741.48

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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.