Home / 20,735.61-28,615.32-11,304.78

Finding the Fourth Proportional to 20,735.61, 28,615.32 and 11,304.78

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Solution

The fourth proportional to 20,735.61, 28,615.32 and 11,304.78 is: 15,600.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,735.61 : 28,615.32 = 11,304.78 : x
  2. Step 2: Convert to fraction form
    20,735.61/28,615.32 = 11,304.78/x
  3. Step 3: Cross multiply
    20,735.61x = 28,615.32 × 11,304.78
  4. Step 4: Simplify right side
    20,735.61x = 323,489,897.23
  5. Step 5: Solve for x
    x = 323,489,897.23/20,735.61
  6. Step 6: Final answer
    x = 15,600.69

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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.