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Finding the Fourth Proportional to 7,643.56, 10,548.64 and 4,287

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Solution

The fourth proportional to 7,643.56, 10,548.64 and 4,287 is: 5,916.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,643.56 : 10,548.64 = 4,287 : x
  2. Step 2: Convert to fraction form
    7,643.56/10,548.64 = 4,287/x
  3. Step 3: Cross multiply
    7,643.56x = 10,548.64 × 4,287
  4. Step 4: Simplify right side
    7,643.56x = 45,222,019.68
  5. Step 5: Solve for x
    x = 45,222,019.68/7,643.56
  6. Step 6: Final answer
    x = 5,916.36

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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.