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Finding the Fourth Proportional to 19,309.70, 28,985.03 and 17,102.86

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Solution

The fourth proportional to 19,309.70, 28,985.03 and 17,102.86 is: 25,672.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.70 : 28,985.03 = 17,102.86 : x
  2. Step 2: Convert to fraction form
    19,309.70/28,985.03 = 17,102.86/x
  3. Step 3: Cross multiply
    19,309.70x = 28,985.03 × 17,102.86
  4. Step 4: Simplify right side
    19,309.70x = 495,726,910.19
  5. Step 5: Solve for x
    x = 495,726,910.19/19,309.70
  6. Step 6: Final answer
    x = 25,672.43

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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.