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Finding the Fourth Proportional to 19,406.20, 29,060.70 and 15,518.20

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Solution

The fourth proportional to 19,406.20, 29,060.70 and 15,518.20 is: 23,238.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,406.20 : 29,060.70 = 15,518.20 : x
  2. Step 2: Convert to fraction form
    19,406.20/29,060.70 = 15,518.20/x
  3. Step 3: Cross multiply
    19,406.20x = 29,060.70 × 15,518.20
  4. Step 4: Simplify right side
    19,406.20x = 450,969,754.74
  5. Step 5: Solve for x
    x = 450,969,754.74/19,406.20
  6. Step 6: Final answer
    x = 23,238.44

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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.