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Finding the Fourth Proportional to 19,010.84, 28,509 and 7,609.28

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Solution

The fourth proportional to 19,010.84, 28,509 and 7,609.28 is: 11,411.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,010.84 : 28,509 = 7,609.28 : x
  2. Step 2: Convert to fraction form
    19,010.84/28,509 = 7,609.28/x
  3. Step 3: Cross multiply
    19,010.84x = 28,509 × 7,609.28
  4. Step 4: Simplify right side
    19,010.84x = 216,932,963.52
  5. Step 5: Solve for x
    x = 216,932,963.52/19,010.84
  6. Step 6: Final answer
    x = 11,411.01

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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.