Home / 13,669.92-18,857.12-9,140.40

Finding the Fourth Proportional to 13,669.92, 18,857.12 and 9,140.40

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Solution

The fourth proportional to 13,669.92, 18,857.12 and 9,140.40 is: 12,608.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,669.92 : 18,857.12 = 9,140.40 : x
  2. Step 2: Convert to fraction form
    13,669.92/18,857.12 = 9,140.40/x
  3. Step 3: Cross multiply
    13,669.92x = 18,857.12 × 9,140.40
  4. Step 4: Simplify right side
    13,669.92x = 172,361,619.65
  5. Step 5: Solve for x
    x = 172,361,619.65/13,669.92
  6. Step 6: Final answer
    x = 12,608.82

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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.