Home / 11,399.16-15,739.74-8,742.36

Finding the Fourth Proportional to 11,399.16, 15,739.74 and 8,742.36

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Solution

The fourth proportional to 11,399.16, 15,739.74 and 8,742.36 is: 12,071.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,399.16 : 15,739.74 = 8,742.36 : x
  2. Step 2: Convert to fraction form
    11,399.16/15,739.74 = 8,742.36/x
  3. Step 3: Cross multiply
    11,399.16x = 15,739.74 × 8,742.36
  4. Step 4: Simplify right side
    11,399.16x = 137,602,473.39
  5. Step 5: Solve for x
    x = 137,602,473.39/11,399.16
  6. Step 6: Final answer
    x = 12,071.28

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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.