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Finding the Fourth Proportional to 19,187.88, 28,798.22 and 7,509.30

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Solution

The fourth proportional to 19,187.88, 28,798.22 and 7,509.30 is: 11,270.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,187.88 : 28,798.22 = 7,509.30 : x
  2. Step 2: Convert to fraction form
    19,187.88/28,798.22 = 7,509.30/x
  3. Step 3: Cross multiply
    19,187.88x = 28,798.22 × 7,509.30
  4. Step 4: Simplify right side
    19,187.88x = 216,254,473.45
  5. Step 5: Solve for x
    x = 216,254,473.45/19,187.88
  6. Step 6: Final answer
    x = 11,270.37

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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.