Home / 13,690.08-18,892.24-7,721.39

Finding the Fourth Proportional to 13,690.08, 18,892.24 and 7,721.39

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Solution

The fourth proportional to 13,690.08, 18,892.24 and 7,721.39 is: 10,655.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.08 : 18,892.24 = 7,721.39 : x
  2. Step 2: Convert to fraction form
    13,690.08/18,892.24 = 7,721.39/x
  3. Step 3: Cross multiply
    13,690.08x = 18,892.24 × 7,721.39
  4. Step 4: Simplify right side
    13,690.08x = 145,874,380.94
  5. Step 5: Solve for x
    x = 145,874,380.94/13,690.08
  6. Step 6: Final answer
    x = 10,655.48

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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.