Home / 18,930.72-28,374.84-6,439.08

Finding the Fourth Proportional to 18,930.72, 28,374.84 and 6,439.08

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Solution

The fourth proportional to 18,930.72, 28,374.84 and 6,439.08 is: 9,651.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.72 : 28,374.84 = 6,439.08 : x
  2. Step 2: Convert to fraction form
    18,930.72/28,374.84 = 6,439.08/x
  3. Step 3: Cross multiply
    18,930.72x = 28,374.84 × 6,439.08
  4. Step 4: Simplify right side
    18,930.72x = 182,707,864.75
  5. Step 5: Solve for x
    x = 182,707,864.75/18,930.72
  6. Step 6: Final answer
    x = 9,651.40

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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.