Home / 13,311.36-18,369.28-7,722.08

Finding the Fourth Proportional to 13,311.36, 18,369.28 and 7,722.08

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Solution

The fourth proportional to 13,311.36, 18,369.28 and 7,722.08 is: 10,656.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.36 : 18,369.28 = 7,722.08 : x
  2. Step 2: Convert to fraction form
    13,311.36/18,369.28 = 7,722.08/x
  3. Step 3: Cross multiply
    13,311.36x = 18,369.28 × 7,722.08
  4. Step 4: Simplify right side
    13,311.36x = 141,849,049.70
  5. Step 5: Solve for x
    x = 141,849,049.70/13,311.36
  6. Step 6: Final answer
    x = 10,656.24

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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.