Home / 20,690.38-28,552.86-11,259.01

Finding the Fourth Proportional to 20,690.38, 28,552.86 and 11,259.01

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Solution

The fourth proportional to 20,690.38, 28,552.86 and 11,259.01 is: 15,537.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.38 : 28,552.86 = 11,259.01 : x
  2. Step 2: Convert to fraction form
    20,690.38/28,552.86 = 11,259.01/x
  3. Step 3: Cross multiply
    20,690.38x = 28,552.86 × 11,259.01
  4. Step 4: Simplify right side
    20,690.38x = 321,476,737.21
  5. Step 5: Solve for x
    x = 321,476,737.21/20,690.38
  6. Step 6: Final answer
    x = 15,537.50

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Half scale
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Double scale
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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.