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Finding the Fourth Proportional to 19,205.80, 28,810.62 and 6,890.92

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Solution

The fourth proportional to 19,205.80, 28,810.62 and 6,890.92 is: 10,337.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,205.80 : 28,810.62 = 6,890.92 : x
  2. Step 2: Convert to fraction form
    19,205.80/28,810.62 = 6,890.92/x
  3. Step 3: Cross multiply
    19,205.80x = 28,810.62 × 6,890.92
  4. Step 4: Simplify right side
    19,205.80x = 198,531,677.57
  5. Step 5: Solve for x
    x = 198,531,677.57/19,205.80
  6. Step 6: Final answer
    x = 10,337.07

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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.