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Finding the Fourth Proportional to 19,797.72, 29,653.36 and 9,919.76

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Solution

The fourth proportional to 19,797.72, 29,653.36 and 9,919.76 is: 14,857.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,797.72 : 29,653.36 = 9,919.76 : x
  2. Step 2: Convert to fraction form
    19,797.72/29,653.36 = 9,919.76/x
  3. Step 3: Cross multiply
    19,797.72x = 29,653.36 × 9,919.76
  4. Step 4: Simplify right side
    19,797.72x = 294,154,214.39
  5. Step 5: Solve for x
    x = 294,154,214.39/19,797.72
  6. Step 6: Final answer
    x = 14,857.98

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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.