Home / 13,415.39-18,512.36-7,447.05

Finding the Fourth Proportional to 13,415.39, 18,512.36 and 7,447.05

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Solution

The fourth proportional to 13,415.39, 18,512.36 and 7,447.05 is: 10,276.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.39 : 18,512.36 = 7,447.05 : x
  2. Step 2: Convert to fraction form
    13,415.39/18,512.36 = 7,447.05/x
  3. Step 3: Cross multiply
    13,415.39x = 18,512.36 × 7,447.05
  4. Step 4: Simplify right side
    13,415.39x = 137,862,433.30
  5. Step 5: Solve for x
    x = 137,862,433.30/13,415.39
  6. Step 6: Final answer
    x = 10,276.44

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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.