Home / 20,776.98-28,672.72-11,345.60

Finding the Fourth Proportional to 20,776.98, 28,672.72 and 11,345.60

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Solution

The fourth proportional to 20,776.98, 28,672.72 and 11,345.60 is: 15,657.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.98 : 28,672.72 = 11,345.60 : x
  2. Step 2: Convert to fraction form
    20,776.98/28,672.72 = 11,345.60/x
  3. Step 3: Cross multiply
    20,776.98x = 28,672.72 × 11,345.60
  4. Step 4: Simplify right side
    20,776.98x = 325,309,212.03
  5. Step 5: Solve for x
    x = 325,309,212.03/20,776.98
  6. Step 6: Final answer
    x = 15,657.19

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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.