Home / 20,962.76-28,928.68-11,402.64

Finding the Fourth Proportional to 20,962.76, 28,928.68 and 11,402.64

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Solution

The fourth proportional to 20,962.76, 28,928.68 and 11,402.64 is: 15,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.76 : 28,928.68 = 11,402.64 : x
  2. Step 2: Convert to fraction form
    20,962.76/28,928.68 = 11,402.64/x
  3. Step 3: Cross multiply
    20,962.76x = 28,928.68 × 11,402.64
  4. Step 4: Simplify right side
    20,962.76x = 329,863,295.21
  5. Step 5: Solve for x
    x = 329,863,295.21/20,962.76
  6. Step 6: Final answer
    x = 15,735.68

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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.