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Finding the Fourth Proportional to 16,991.08, 23,430.90 and 12,968.20

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Solution

The fourth proportional to 16,991.08, 23,430.90 and 12,968.20 is: 17,883.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,991.08 : 23,430.90 = 12,968.20 : x
  2. Step 2: Convert to fraction form
    16,991.08/23,430.90 = 12,968.20/x
  3. Step 3: Cross multiply
    16,991.08x = 23,430.90 × 12,968.20
  4. Step 4: Simplify right side
    16,991.08x = 303,856,597.38
  5. Step 5: Solve for x
    x = 303,856,597.38/16,991.08
  6. Step 6: Final answer
    x = 17,883.30

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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.