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Finding the Fourth Proportional to 19,309.71, 28,985.04 and 17,102.85

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Solution

The fourth proportional to 19,309.71, 28,985.04 and 17,102.85 is: 25,672.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.71 : 28,985.04 = 17,102.85 : x
  2. Step 2: Convert to fraction form
    19,309.71/28,985.04 = 17,102.85/x
  3. Step 3: Cross multiply
    19,309.71x = 28,985.04 × 17,102.85
  4. Step 4: Simplify right side
    19,309.71x = 495,726,791.36
  5. Step 5: Solve for x
    x = 495,726,791.36/19,309.71
  6. Step 6: Final answer
    x = 25,672.41

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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.