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Finding the Fourth Proportional to 8,643.71, 11,925.36 and 5,241.76

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Solution

The fourth proportional to 8,643.71, 11,925.36 and 5,241.76 is: 7,231.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.71 : 11,925.36 = 5,241.76 : x
  2. Step 2: Convert to fraction form
    8,643.71/11,925.36 = 5,241.76/x
  3. Step 3: Cross multiply
    8,643.71x = 11,925.36 × 5,241.76
  4. Step 4: Simplify right side
    8,643.71x = 62,509,864.88
  5. Step 5: Solve for x
    x = 62,509,864.88/8,643.71
  6. Step 6: Final answer
    x = 7,231.83

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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.