Home / 13,129.96-18,122.79-7,468.02

Finding the Fourth Proportional to 13,129.96, 18,122.79 and 7,468.02

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Solution

The fourth proportional to 13,129.96, 18,122.79 and 7,468.02 is: 10,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.96 : 18,122.79 = 7,468.02 : x
  2. Step 2: Convert to fraction form
    13,129.96/18,122.79 = 7,468.02/x
  3. Step 3: Cross multiply
    13,129.96x = 18,122.79 × 7,468.02
  4. Step 4: Simplify right side
    13,129.96x = 135,341,358.18
  5. Step 5: Solve for x
    x = 135,341,358.18/13,129.96
  6. Step 6: Final answer
    x = 10,307.83

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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.