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Finding the Fourth Proportional to 19,929.28, 29,893.92 and 6,078.28

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Solution

The fourth proportional to 19,929.28, 29,893.92 and 6,078.28 is: 9,117.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,929.28 : 29,893.92 = 6,078.28 : x
  2. Step 2: Convert to fraction form
    19,929.28/29,893.92 = 6,078.28/x
  3. Step 3: Cross multiply
    19,929.28x = 29,893.92 × 6,078.28
  4. Step 4: Simplify right side
    19,929.28x = 181,703,616.06
  5. Step 5: Solve for x
    x = 181,703,616.06/19,929.28
  6. Step 6: Final answer
    x = 9,117.42

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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.