Home / 15,553.68-21,456.27-9,879.17

Finding the Fourth Proportional to 15,553.68, 21,456.27 and 9,879.17

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Solution

The fourth proportional to 15,553.68, 21,456.27 and 9,879.17 is: 13,628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,553.68 : 21,456.27 = 9,879.17 : x
  2. Step 2: Convert to fraction form
    15,553.68/21,456.27 = 9,879.17/x
  3. Step 3: Cross multiply
    15,553.68x = 21,456.27 × 9,879.17
  4. Step 4: Simplify right side
    15,553.68x = 211,970,085.26
  5. Step 5: Solve for x
    x = 211,970,085.26/15,553.68
  6. Step 6: Final answer
    x = 13,628.30

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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.