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Finding the Fourth Proportional to 19,720.08, 29,572.38 and 8,029.08

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Solution

The fourth proportional to 19,720.08, 29,572.38 and 8,029.08 is: 12,040.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.08 : 29,572.38 = 8,029.08 : x
  2. Step 2: Convert to fraction form
    19,720.08/29,572.38 = 8,029.08/x
  3. Step 3: Cross multiply
    19,720.08x = 29,572.38 × 8,029.08
  4. Step 4: Simplify right side
    19,720.08x = 237,439,004.81
  5. Step 5: Solve for x
    x = 237,439,004.81/19,720.08
  6. Step 6: Final answer
    x = 12,040.47

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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.