Home / 13,178.08-18,185.64-7,209.80

Finding the Fourth Proportional to 13,178.08, 18,185.64 and 7,209.80

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Solution

The fourth proportional to 13,178.08, 18,185.64 and 7,209.80 is: 9,949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.08 : 18,185.64 = 7,209.80 : x
  2. Step 2: Convert to fraction form
    13,178.08/18,185.64 = 7,209.80/x
  3. Step 3: Cross multiply
    13,178.08x = 18,185.64 × 7,209.80
  4. Step 4: Simplify right side
    13,178.08x = 131,114,827.27
  5. Step 5: Solve for x
    x = 131,114,827.27/13,178.08
  6. Step 6: Final answer
    x = 9,949.46

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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.