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Finding the Fourth Proportional to 12,309.19, 16,986.73 and 7,003.89

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Solution

The fourth proportional to 12,309.19, 16,986.73 and 7,003.89 is: 9,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.19 : 16,986.73 = 7,003.89 : x
  2. Step 2: Convert to fraction form
    12,309.19/16,986.73 = 7,003.89/x
  3. Step 3: Cross multiply
    12,309.19x = 16,986.73 × 7,003.89
  4. Step 4: Simplify right side
    12,309.19x = 118,973,188.38
  5. Step 5: Solve for x
    x = 118,973,188.38/12,309.19
  6. Step 6: Final answer
    x = 9,665.40

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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.