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Finding the Fourth Proportional to 28,135.72, 42,202.74 and 7,075.72

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Solution

The fourth proportional to 28,135.72, 42,202.74 and 7,075.72 is: 10,613.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.72 : 42,202.74 = 7,075.72 : x
  2. Step 2: Convert to fraction form
    28,135.72/42,202.74 = 7,075.72/x
  3. Step 3: Cross multiply
    28,135.72x = 42,202.74 × 7,075.72
  4. Step 4: Simplify right side
    28,135.72x = 298,614,771.47
  5. Step 5: Solve for x
    x = 298,614,771.47/28,135.72
  6. Step 6: Final answer
    x = 10,613.37

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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.