Home / 20,721.06-28,594.88-11,289.60

Finding the Fourth Proportional to 20,721.06, 28,594.88 and 11,289.60

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Solution

The fourth proportional to 20,721.06, 28,594.88 and 11,289.60 is: 15,579.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.06 : 28,594.88 = 11,289.60 : x
  2. Step 2: Convert to fraction form
    20,721.06/28,594.88 = 11,289.60/x
  3. Step 3: Cross multiply
    20,721.06x = 28,594.88 × 11,289.60
  4. Step 4: Simplify right side
    20,721.06x = 322,824,757.25
  5. Step 5: Solve for x
    x = 322,824,757.25/20,721.06
  6. Step 6: Final answer
    x = 15,579.55

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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.