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Finding the Fourth Proportional to 12,989.90, 19,487.74 and 6,060.62

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Solution

The fourth proportional to 12,989.90, 19,487.74 and 6,060.62 is: 9,092.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.90 : 19,487.74 = 6,060.62 : x
  2. Step 2: Convert to fraction form
    12,989.90/19,487.74 = 6,060.62/x
  3. Step 3: Cross multiply
    12,989.90x = 19,487.74 × 6,060.62
  4. Step 4: Simplify right side
    12,989.90x = 118,107,786.80
  5. Step 5: Solve for x
    x = 118,107,786.80/12,989.90
  6. Step 6: Final answer
    x = 9,092.28

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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.