Home / 13,447.20-18,556.12-7,781.94

Finding the Fourth Proportional to 13,447.20, 18,556.12 and 7,781.94

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Solution

The fourth proportional to 13,447.20, 18,556.12 and 7,781.94 is: 10,738.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.20 : 18,556.12 = 7,781.94 : x
  2. Step 2: Convert to fraction form
    13,447.20/18,556.12 = 7,781.94/x
  3. Step 3: Cross multiply
    13,447.20x = 18,556.12 × 7,781.94
  4. Step 4: Simplify right side
    13,447.20x = 144,402,612.47
  5. Step 5: Solve for x
    x = 144,402,612.47/13,447.20
  6. Step 6: Final answer
    x = 10,738.49

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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.