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Finding the Fourth Proportional to 12,487.77, 18,740.77 and 9,209.70

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Solution

The fourth proportional to 12,487.77, 18,740.77 and 9,209.70 is: 13,821.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.77 : 18,740.77 = 9,209.70 : x
  2. Step 2: Convert to fraction form
    12,487.77/18,740.77 = 9,209.70/x
  3. Step 3: Cross multiply
    12,487.77x = 18,740.77 × 9,209.70
  4. Step 4: Simplify right side
    12,487.77x = 172,596,846.44
  5. Step 5: Solve for x
    x = 172,596,846.44/12,487.77
  6. Step 6: Final answer
    x = 13,821.27

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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.