Home / 13,395.18-18,485.19-7,729.86

Finding the Fourth Proportional to 13,395.18, 18,485.19 and 7,729.86

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Solution

The fourth proportional to 13,395.18, 18,485.19 and 7,729.86 is: 10,667.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.18 : 18,485.19 = 7,729.86 : x
  2. Step 2: Convert to fraction form
    13,395.18/18,485.19 = 7,729.86/x
  3. Step 3: Cross multiply
    13,395.18x = 18,485.19 × 7,729.86
  4. Step 4: Simplify right side
    13,395.18x = 142,887,930.77
  5. Step 5: Solve for x
    x = 142,887,930.77/13,395.18
  6. Step 6: Final answer
    x = 10,667.12

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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.