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Finding the Fourth Proportional to 8,907.14, 12,297.43 and 5,721.72

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Solution

The fourth proportional to 8,907.14, 12,297.43 and 5,721.72 is: 7,899.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907.14 : 12,297.43 = 5,721.72 : x
  2. Step 2: Convert to fraction form
    8,907.14/12,297.43 = 5,721.72/x
  3. Step 3: Cross multiply
    8,907.14x = 12,297.43 × 5,721.72
  4. Step 4: Simplify right side
    8,907.14x = 70,362,451.18
  5. Step 5: Solve for x
    x = 70,362,451.18/8,907.14
  6. Step 6: Final answer
    x = 7,899.56

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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.