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Finding the Fourth Proportional to 28,036.80, 42,054.26 and 6,976.80

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Solution

The fourth proportional to 28,036.80, 42,054.26 and 6,976.80 is: 10,464.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,036.80 : 42,054.26 = 6,976.80 : x
  2. Step 2: Convert to fraction form
    28,036.80/42,054.26 = 6,976.80/x
  3. Step 3: Cross multiply
    28,036.80x = 42,054.26 × 6,976.80
  4. Step 4: Simplify right side
    28,036.80x = 293,404,126.28
  5. Step 5: Solve for x
    x = 293,404,126.28/28,036.80
  6. Step 6: Final answer
    x = 10,464.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.