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Finding the Fourth Proportional to 19,797.20, 29,695.80 and 12,424.40

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Solution

The fourth proportional to 19,797.20, 29,695.80 and 12,424.40 is: 18,636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,797.20 : 29,695.80 = 12,424.40 : x
  2. Step 2: Convert to fraction form
    19,797.20/29,695.80 = 12,424.40/x
  3. Step 3: Cross multiply
    19,797.20x = 29,695.80 × 12,424.40
  4. Step 4: Simplify right side
    19,797.20x = 368,952,497.52
  5. Step 5: Solve for x
    x = 368,952,497.52/19,797.20
  6. Step 6: Final answer
    x = 18,636.60

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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.