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Finding the Fourth Proportional to 7,643.69, 10,548.14 and 4,286.79

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Solution

The fourth proportional to 7,643.69, 10,548.14 and 4,286.79 is: 5,915.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,643.69 : 10,548.14 = 4,286.79 : x
  2. Step 2: Convert to fraction form
    7,643.69/10,548.14 = 4,286.79/x
  3. Step 3: Cross multiply
    7,643.69x = 10,548.14 × 4,286.79
  4. Step 4: Simplify right side
    7,643.69x = 45,217,661.07
  5. Step 5: Solve for x
    x = 45,217,661.07/7,643.69
  6. Step 6: Final answer
    x = 5,915.68

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Half scale
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Double scale
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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.