Home / 13,431.83-18,530.61-7,765.53

Finding the Fourth Proportional to 13,431.83, 18,530.61 and 7,765.53

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Solution

The fourth proportional to 13,431.83, 18,530.61 and 7,765.53 is: 10,713.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.83 : 18,530.61 = 7,765.53 : x
  2. Step 2: Convert to fraction form
    13,431.83/18,530.61 = 7,765.53/x
  3. Step 3: Cross multiply
    13,431.83x = 18,530.61 × 7,765.53
  4. Step 4: Simplify right side
    13,431.83x = 143,899,909.26
  5. Step 5: Solve for x
    x = 143,899,909.26/13,431.83
  6. Step 6: Final answer
    x = 10,713.35

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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.