Home / 13,691.24-18,892.74-7,721.72

Finding the Fourth Proportional to 13,691.24, 18,892.74 and 7,721.72

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Solution

The fourth proportional to 13,691.24, 18,892.74 and 7,721.72 is: 10,655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.24 : 18,892.74 = 7,721.72 : x
  2. Step 2: Convert to fraction form
    13,691.24/18,892.74 = 7,721.72/x
  3. Step 3: Cross multiply
    13,691.24x = 18,892.74 × 7,721.72
  4. Step 4: Simplify right side
    13,691.24x = 145,884,448.31
  5. Step 5: Solve for x
    x = 145,884,448.31/13,691.24
  6. Step 6: Final answer
    x = 10,655.31

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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.