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Finding the Fourth Proportional to 12,329.99, 17,011.22 and 7,021.05

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Solution

The fourth proportional to 12,329.99, 17,011.22 and 7,021.05 is: 9,686.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,329.99 : 17,011.22 = 7,021.05 : x
  2. Step 2: Convert to fraction form
    12,329.99/17,011.22 = 7,021.05/x
  3. Step 3: Cross multiply
    12,329.99x = 17,011.22 × 7,021.05
  4. Step 4: Simplify right side
    12,329.99x = 119,436,626.18
  5. Step 5: Solve for x
    x = 119,436,626.18/12,329.99
  6. Step 6: Final answer
    x = 9,686.68

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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.