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Finding the Fourth Proportional to 21,605.99, 29,815.01 and 12,045.56

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Solution

The fourth proportional to 21,605.99, 29,815.01 and 12,045.56 is: 16,622.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.99 : 29,815.01 = 12,045.56 : x
  2. Step 2: Convert to fraction form
    21,605.99/29,815.01 = 12,045.56/x
  3. Step 3: Cross multiply
    21,605.99x = 29,815.01 × 12,045.56
  4. Step 4: Simplify right side
    21,605.99x = 359,138,491.86
  5. Step 5: Solve for x
    x = 359,138,491.86/21,605.99
  6. Step 6: Final answer
    x = 16,622.17

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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.