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Finding the Fourth Proportional to 12,487.46, 18,730.44 and 7,555.77

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Solution

The fourth proportional to 12,487.46, 18,730.44 and 7,555.77 is: 11,333.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.46 : 18,730.44 = 7,555.77 : x
  2. Step 2: Convert to fraction form
    12,487.46/18,730.44 = 7,555.77/x
  3. Step 3: Cross multiply
    12,487.46x = 18,730.44 × 7,555.77
  4. Step 4: Simplify right side
    12,487.46x = 141,522,896.64
  5. Step 5: Solve for x
    x = 141,522,896.64/12,487.46
  6. Step 6: Final answer
    x = 11,333.21

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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.