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Finding the Fourth Proportional to 19,307.80, 29,004.90 and 18,520.60

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Solution

The fourth proportional to 19,307.80, 29,004.90 and 18,520.60 is: 27,822.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,307.80 : 29,004.90 = 18,520.60 : x
  2. Step 2: Convert to fraction form
    19,307.80/29,004.90 = 18,520.60/x
  3. Step 3: Cross multiply
    19,307.80x = 29,004.90 × 18,520.60
  4. Step 4: Simplify right side
    19,307.80x = 537,188,150.94
  5. Step 5: Solve for x
    x = 537,188,150.94/19,307.80
  6. Step 6: Final answer
    x = 27,822.34

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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.