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Finding the Fourth Proportional to 19,865.68, 29,798.64 and 8,170.72

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Solution

The fourth proportional to 19,865.68, 29,798.64 and 8,170.72 is: 12,256.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,865.68 : 29,798.64 = 8,170.72 : x
  2. Step 2: Convert to fraction form
    19,865.68/29,798.64 = 8,170.72/x
  3. Step 3: Cross multiply
    19,865.68x = 29,798.64 × 8,170.72
  4. Step 4: Simplify right side
    19,865.68x = 243,476,343.82
  5. Step 5: Solve for x
    x = 243,476,343.82/19,865.68
  6. Step 6: Final answer
    x = 12,256.13

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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.