Home / 13,411.08-18,507.21-7,745.75

Finding the Fourth Proportional to 13,411.08, 18,507.21 and 7,745.75

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Solution

The fourth proportional to 13,411.08, 18,507.21 and 7,745.75 is: 10,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,411.08 : 18,507.21 = 7,745.75 : x
  2. Step 2: Convert to fraction form
    13,411.08/18,507.21 = 7,745.75/x
  3. Step 3: Cross multiply
    13,411.08x = 18,507.21 × 7,745.75
  4. Step 4: Simplify right side
    13,411.08x = 143,352,221.86
  5. Step 5: Solve for x
    x = 143,352,221.86/13,411.08
  6. Step 6: Final answer
    x = 10,689.09

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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.