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Finding the Fourth Proportional to 7,143.93, 9,855.81 and 4,453.57

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Solution

The fourth proportional to 7,143.93, 9,855.81 and 4,453.57 is: 6,144.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.93 : 9,855.81 = 4,453.57 : x
  2. Step 2: Convert to fraction form
    7,143.93/9,855.81 = 4,453.57/x
  3. Step 3: Cross multiply
    7,143.93x = 9,855.81 × 4,453.57
  4. Step 4: Simplify right side
    7,143.93x = 43,893,539.74
  5. Step 5: Solve for x
    x = 43,893,539.74/7,143.93
  6. Step 6: Final answer
    x = 6,144.17

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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.