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Finding the Fourth Proportional to 19,285.28, 28,934.04 and 11,879.48

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Solution

The fourth proportional to 19,285.28, 28,934.04 and 11,879.48 is: 17,822.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,285.28 : 28,934.04 = 11,879.48 : x
  2. Step 2: Convert to fraction form
    19,285.28/28,934.04 = 11,879.48/x
  3. Step 3: Cross multiply
    19,285.28x = 28,934.04 × 11,879.48
  4. Step 4: Simplify right side
    19,285.28x = 343,721,349.50
  5. Step 5: Solve for x
    x = 343,721,349.50/19,285.28
  6. Step 6: Final answer
    x = 17,822.99

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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.