Home / 13,116.96-18,102-7,739.68

Finding the Fourth Proportional to 13,116.96, 18,102 and 7,739.68

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Solution

The fourth proportional to 13,116.96, 18,102 and 7,739.68 is: 10,681.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,116.96 : 18,102 = 7,739.68 : x
  2. Step 2: Convert to fraction form
    13,116.96/18,102 = 7,739.68/x
  3. Step 3: Cross multiply
    13,116.96x = 18,102 × 7,739.68
  4. Step 4: Simplify right side
    13,116.96x = 140,103,687.36
  5. Step 5: Solve for x
    x = 140,103,687.36/13,116.96
  6. Step 6: Final answer
    x = 10,681.11

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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.