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Finding the Fourth Proportional to 18,926.71, 28,394.49 and 5,779.08

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Solution

The fourth proportional to 18,926.71, 28,394.49 and 5,779.08 is: 8,669.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,926.71 : 28,394.49 = 5,779.08 : x
  2. Step 2: Convert to fraction form
    18,926.71/28,394.49 = 5,779.08/x
  3. Step 3: Cross multiply
    18,926.71x = 28,394.49 × 5,779.08
  4. Step 4: Simplify right side
    18,926.71x = 164,094,029.27
  5. Step 5: Solve for x
    x = 164,094,029.27/18,926.71
  6. Step 6: Final answer
    x = 8,669.97

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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.