Home / 13,540.06-18,685.40-7,490.20

Finding the Fourth Proportional to 13,540.06, 18,685.40 and 7,490.20

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Solution

The fourth proportional to 13,540.06, 18,685.40 and 7,490.20 is: 10,336.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.06 : 18,685.40 = 7,490.20 : x
  2. Step 2: Convert to fraction form
    13,540.06/18,685.40 = 7,490.20/x
  3. Step 3: Cross multiply
    13,540.06x = 18,685.40 × 7,490.20
  4. Step 4: Simplify right side
    13,540.06x = 139,957,383.08
  5. Step 5: Solve for x
    x = 139,957,383.08/13,540.06
  6. Step 6: Final answer
    x = 10,336.54

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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.