Home / 13,209.72-18,231.08-7,907.44

Finding the Fourth Proportional to 13,209.72, 18,231.08 and 7,907.44

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Solution

The fourth proportional to 13,209.72, 18,231.08 and 7,907.44 is: 10,913.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.72 : 18,231.08 = 7,907.44 : x
  2. Step 2: Convert to fraction form
    13,209.72/18,231.08 = 7,907.44/x
  3. Step 3: Cross multiply
    13,209.72x = 18,231.08 × 7,907.44
  4. Step 4: Simplify right side
    13,209.72x = 144,161,171.24
  5. Step 5: Solve for x
    x = 144,161,171.24/13,209.72
  6. Step 6: Final answer
    x = 10,913.26

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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.