Home / 10,139.49-13,992.44-5,663.21

Finding the Fourth Proportional to 10,139.49, 13,992.44 and 5,663.21

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Solution

The fourth proportional to 10,139.49, 13,992.44 and 5,663.21 is: 7,815.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.49 : 13,992.44 = 5,663.21 : x
  2. Step 2: Convert to fraction form
    10,139.49/13,992.44 = 5,663.21/x
  3. Step 3: Cross multiply
    10,139.49x = 13,992.44 × 5,663.21
  4. Step 4: Simplify right side
    10,139.49x = 79,242,027.85
  5. Step 5: Solve for x
    x = 79,242,027.85/10,139.49
  6. Step 6: Final answer
    x = 7,815.19

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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.