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Finding the Fourth Proportional to 19,004.68, 28,509.28 and 7,918.88

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Solution

The fourth proportional to 19,004.68, 28,509.28 and 7,918.88 is: 11,879.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,004.68 : 28,509.28 = 7,918.88 : x
  2. Step 2: Convert to fraction form
    19,004.68/28,509.28 = 7,918.88/x
  3. Step 3: Cross multiply
    19,004.68x = 28,509.28 × 7,918.88
  4. Step 4: Simplify right side
    19,004.68x = 225,761,567.21
  5. Step 5: Solve for x
    x = 225,761,567.21/19,004.68
  6. Step 6: Final answer
    x = 11,879.26

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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.