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Finding the Fourth Proportional to 12,687.99, 17,509.46 and 7,023.13

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Solution

The fourth proportional to 12,687.99, 17,509.46 and 7,023.13 is: 9,691.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.99 : 17,509.46 = 7,023.13 : x
  2. Step 2: Convert to fraction form
    12,687.99/17,509.46 = 7,023.13/x
  3. Step 3: Cross multiply
    12,687.99x = 17,509.46 × 7,023.13
  4. Step 4: Simplify right side
    12,687.99x = 122,971,233.55
  5. Step 5: Solve for x
    x = 122,971,233.55/12,687.99
  6. Step 6: Final answer
    x = 9,691.94

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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.