Home / 20,887.74-28,825.53-11,456.28

Finding the Fourth Proportional to 20,887.74, 28,825.53 and 11,456.28

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Solution

The fourth proportional to 20,887.74, 28,825.53 and 11,456.28 is: 15,809.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.74 : 28,825.53 = 11,456.28 : x
  2. Step 2: Convert to fraction form
    20,887.74/28,825.53 = 11,456.28/x
  3. Step 3: Cross multiply
    20,887.74x = 28,825.53 × 11,456.28
  4. Step 4: Simplify right side
    20,887.74x = 330,233,342.83
  5. Step 5: Solve for x
    x = 330,233,342.83/20,887.74
  6. Step 6: Final answer
    x = 15,809.91

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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.