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Finding the Fourth Proportional to 8,487.47, 12,730.75 and 2,643.63

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Solution

The fourth proportional to 8,487.47, 12,730.75 and 2,643.63 is: 3,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.47 : 12,730.75 = 2,643.63 : x
  2. Step 2: Convert to fraction form
    8,487.47/12,730.75 = 2,643.63/x
  3. Step 3: Cross multiply
    8,487.47x = 12,730.75 × 2,643.63
  4. Step 4: Simplify right side
    8,487.47x = 33,655,392.62
  5. Step 5: Solve for x
    x = 33,655,392.62/8,487.47
  6. Step 6: Final answer
    x = 3,965.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.