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Finding the Fourth Proportional to 19,131.90, 28,697.86 and 7,282.85

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Solution

The fourth proportional to 19,131.90, 28,697.86 and 7,282.85 is: 10,924.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,131.90 : 28,697.86 = 7,282.85 : x
  2. Step 2: Convert to fraction form
    19,131.90/28,697.86 = 7,282.85/x
  3. Step 3: Cross multiply
    19,131.90x = 28,697.86 × 7,282.85
  4. Step 4: Simplify right side
    19,131.90x = 209,002,075.32
  5. Step 5: Solve for x
    x = 209,002,075.32/19,131.90
  6. Step 6: Final answer
    x = 10,924.27

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Double scale
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Similar ratio
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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.