Home / 20,654.80-28,503.78-11,223.40

Finding the Fourth Proportional to 20,654.80, 28,503.78 and 11,223.40

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Solution

The fourth proportional to 20,654.80, 28,503.78 and 11,223.40 is: 15,488.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.80 : 28,503.78 = 11,223.40 : x
  2. Step 2: Convert to fraction form
    20,654.80/28,503.78 = 11,223.40/x
  3. Step 3: Cross multiply
    20,654.80x = 28,503.78 × 11,223.40
  4. Step 4: Simplify right side
    20,654.80x = 319,909,324.45
  5. Step 5: Solve for x
    x = 319,909,324.45/20,654.80
  6. Step 6: Final answer
    x = 15,488.38

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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.