Home / 20,735.78-28,615.50-11,304.32

Finding the Fourth Proportional to 20,735.78, 28,615.50 and 11,304.32

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Solution

The fourth proportional to 20,735.78, 28,615.50 and 11,304.32 is: 15,600.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,735.78 : 28,615.50 = 11,304.32 : x
  2. Step 2: Convert to fraction form
    20,735.78/28,615.50 = 11,304.32/x
  3. Step 3: Cross multiply
    20,735.78x = 28,615.50 × 11,304.32
  4. Step 4: Simplify right side
    20,735.78x = 323,478,625.88
  5. Step 5: Solve for x
    x = 323,478,625.88/20,735.78
  6. Step 6: Final answer
    x = 15,600.03

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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.