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Finding the Fourth Proportional to 19,145.88, 28,713.24 and 7,456.32

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Solution

The fourth proportional to 19,145.88, 28,713.24 and 7,456.32 is: 11,182.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.88 : 28,713.24 = 7,456.32 : x
  2. Step 2: Convert to fraction form
    19,145.88/28,713.24 = 7,456.32/x
  3. Step 3: Cross multiply
    19,145.88x = 28,713.24 × 7,456.32
  4. Step 4: Simplify right side
    19,145.88x = 214,095,105.68
  5. Step 5: Solve for x
    x = 214,095,105.68/19,145.88
  6. Step 6: Final answer
    x = 11,182.31

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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.