Home / 13,447.79-18,558.19-7,479.46

Finding the Fourth Proportional to 13,447.79, 18,558.19 and 7,479.46

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Solution

The fourth proportional to 13,447.79, 18,558.19 and 7,479.46 is: 10,321.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.79 : 18,558.19 = 7,479.46 : x
  2. Step 2: Convert to fraction form
    13,447.79/18,558.19 = 7,479.46/x
  3. Step 3: Cross multiply
    13,447.79x = 18,558.19 × 7,479.46
  4. Step 4: Simplify right side
    13,447.79x = 138,805,239.78
  5. Step 5: Solve for x
    x = 138,805,239.78/13,447.79
  6. Step 6: Final answer
    x = 10,321.79

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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.