Home / 13,447.20-18,555.71-7,477.91

Finding the Fourth Proportional to 13,447.20, 18,555.71 and 7,477.91

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Solution

The fourth proportional to 13,447.20, 18,555.71 and 7,477.91 is: 10,318.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.20 : 18,555.71 = 7,477.91 : x
  2. Step 2: Convert to fraction form
    13,447.20/18,555.71 = 7,477.91/x
  3. Step 3: Cross multiply
    13,447.20x = 18,555.71 × 7,477.91
  4. Step 4: Simplify right side
    13,447.20x = 138,757,799.20
  5. Step 5: Solve for x
    x = 138,757,799.20/13,447.20
  6. Step 6: Final answer
    x = 10,318.71

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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.