Home / 20,887.80-28,823.54-11,456.34

Finding the Fourth Proportional to 20,887.80, 28,823.54 and 11,456.34

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Solution

The fourth proportional to 20,887.80, 28,823.54 and 11,456.34 is: 15,808.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.80 : 28,823.54 = 11,456.34 : x
  2. Step 2: Convert to fraction form
    20,887.80/28,823.54 = 11,456.34/x
  3. Step 3: Cross multiply
    20,887.80x = 28,823.54 × 11,456.34
  4. Step 4: Simplify right side
    20,887.80x = 330,212,274.24
  5. Step 5: Solve for x
    x = 330,212,274.24/20,887.80
  6. Step 6: Final answer
    x = 15,808.86

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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.