Home / 13,509.09-18,642.51-7,540.70

Finding the Fourth Proportional to 13,509.09, 18,642.51 and 7,540.70

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Solution

The fourth proportional to 13,509.09, 18,642.51 and 7,540.70 is: 10,406.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,509.09 : 18,642.51 = 7,540.70 : x
  2. Step 2: Convert to fraction form
    13,509.09/18,642.51 = 7,540.70/x
  3. Step 3: Cross multiply
    13,509.09x = 18,642.51 × 7,540.70
  4. Step 4: Simplify right side
    13,509.09x = 140,577,481.94
  5. Step 5: Solve for x
    x = 140,577,481.94/13,509.09
  6. Step 6: Final answer
    x = 10,406.14

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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.