Home / 20,721.66-28,595.60-11,290.22

Finding the Fourth Proportional to 20,721.66, 28,595.60 and 11,290.22

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Solution

The fourth proportional to 20,721.66, 28,595.60 and 11,290.22 is: 15,580.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.66 : 28,595.60 = 11,290.22 : x
  2. Step 2: Convert to fraction form
    20,721.66/28,595.60 = 11,290.22/x
  3. Step 3: Cross multiply
    20,721.66x = 28,595.60 × 11,290.22
  4. Step 4: Simplify right side
    20,721.66x = 322,850,615.03
  5. Step 5: Solve for x
    x = 322,850,615.03/20,721.66
  6. Step 6: Final answer
    x = 15,580.35

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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.