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Finding the Fourth Proportional to 19,902.80, 29,911.80 and 17,368.40

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Solution

The fourth proportional to 19,902.80, 29,911.80 and 17,368.40 is: 26,102.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,902.80 : 29,911.80 = 17,368.40 : x
  2. Step 2: Convert to fraction form
    19,902.80/29,911.80 = 17,368.40/x
  3. Step 3: Cross multiply
    19,902.80x = 29,911.80 × 17,368.40
  4. Step 4: Simplify right side
    19,902.80x = 519,520,107.12
  5. Step 5: Solve for x
    x = 519,520,107.12/19,902.80
  6. Step 6: Final answer
    x = 26,102.87

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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.