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Finding the Fourth Proportional to 12,720.99, 19,085.19 and 5,699.44

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Solution

The fourth proportional to 12,720.99, 19,085.19 and 5,699.44 is: 8,550.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.99 : 19,085.19 = 5,699.44 : x
  2. Step 2: Convert to fraction form
    12,720.99/19,085.19 = 5,699.44/x
  3. Step 3: Cross multiply
    12,720.99x = 19,085.19 × 5,699.44
  4. Step 4: Simplify right side
    12,720.99x = 108,774,847.58
  5. Step 5: Solve for x
    x = 108,774,847.58/12,720.99
  6. Step 6: Final answer
    x = 8,550.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.