Home / 20,776.50-28,671.77-11,345.27

Finding the Fourth Proportional to 20,776.50, 28,671.77 and 11,345.27

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Solution

The fourth proportional to 20,776.50, 28,671.77 and 11,345.27 is: 15,656.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.50 : 28,671.77 = 11,345.27 : x
  2. Step 2: Convert to fraction form
    20,776.50/28,671.77 = 11,345.27/x
  3. Step 3: Cross multiply
    20,776.50x = 28,671.77 × 11,345.27
  4. Step 4: Simplify right side
    20,776.50x = 325,288,857.03
  5. Step 5: Solve for x
    x = 325,288,857.03/20,776.50
  6. Step 6: Final answer
    x = 15,656.58

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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.