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Finding the Fourth Proportional to 15,059.99, 20,782.68 and 8,345.99

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Solution

The fourth proportional to 15,059.99, 20,782.68 and 8,345.99 is: 11,517.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,059.99 : 20,782.68 = 8,345.99 : x
  2. Step 2: Convert to fraction form
    15,059.99/20,782.68 = 8,345.99/x
  3. Step 3: Cross multiply
    15,059.99x = 20,782.68 × 8,345.99
  4. Step 4: Simplify right side
    15,059.99x = 173,452,039.45
  5. Step 5: Solve for x
    x = 173,452,039.45/15,059.99
  6. Step 6: Final answer
    x = 11,517.41

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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.