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Finding the Fourth Proportional to 19,798.16, 29,697.28 and 8,109.28

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Solution

The fourth proportional to 19,798.16, 29,697.28 and 8,109.28 is: 12,163.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,798.16 : 29,697.28 = 8,109.28 : x
  2. Step 2: Convert to fraction form
    19,798.16/29,697.28 = 8,109.28/x
  3. Step 3: Cross multiply
    19,798.16x = 29,697.28 × 8,109.28
  4. Step 4: Simplify right side
    19,798.16x = 240,823,558.76
  5. Step 5: Solve for x
    x = 240,823,558.76/19,798.16
  6. Step 6: Final answer
    x = 12,163.94

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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.