Home / 13,736.81-18,957.21-7,768.36

Finding the Fourth Proportional to 13,736.81, 18,957.21 and 7,768.36

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Solution

The fourth proportional to 13,736.81, 18,957.21 and 7,768.36 is: 10,720.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,736.81 : 18,957.21 = 7,768.36 : x
  2. Step 2: Convert to fraction form
    13,736.81/18,957.21 = 7,768.36/x
  3. Step 3: Cross multiply
    13,736.81x = 18,957.21 × 7,768.36
  4. Step 4: Simplify right side
    13,736.81x = 147,266,319.81
  5. Step 5: Solve for x
    x = 147,266,319.81/13,736.81
  6. Step 6: Final answer
    x = 10,720.56

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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.