Home / 13,447.80-18,558.18-7,479.54

Finding the Fourth Proportional to 13,447.80, 18,558.18 and 7,479.54

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Solution

The fourth proportional to 13,447.80, 18,558.18 and 7,479.54 is: 10,321.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.80 : 18,558.18 = 7,479.54 : x
  2. Step 2: Convert to fraction form
    13,447.80/18,558.18 = 7,479.54/x
  3. Step 3: Cross multiply
    13,447.80x = 18,558.18 × 7,479.54
  4. Step 4: Simplify right side
    13,447.80x = 138,806,649.64
  5. Step 5: Solve for x
    x = 138,806,649.64/13,447.80
  6. Step 6: Final answer
    x = 10,321.89

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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.