Home / 13,231.79-18,261.56-7,642.79

Finding the Fourth Proportional to 13,231.79, 18,261.56 and 7,642.79

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Solution

The fourth proportional to 13,231.79, 18,261.56 and 7,642.79 is: 10,548.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,231.79 : 18,261.56 = 7,642.79 : x
  2. Step 2: Convert to fraction form
    13,231.79/18,261.56 = 7,642.79/x
  3. Step 3: Cross multiply
    13,231.79x = 18,261.56 × 7,642.79
  4. Step 4: Simplify right side
    13,231.79x = 139,569,268.15
  5. Step 5: Solve for x
    x = 139,569,268.15/13,231.79
  6. Step 6: Final answer
    x = 10,548.03

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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.