Home / 19,780.80-29,667.90-8,684.52

Finding the Fourth Proportional to 19,780.80, 29,667.90 and 8,684.52

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Solution

The fourth proportional to 19,780.80, 29,667.90 and 8,684.52 is: 13,025.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,780.80 : 29,667.90 = 8,684.52 : x
  2. Step 2: Convert to fraction form
    19,780.80/29,667.90 = 8,684.52/x
  3. Step 3: Cross multiply
    19,780.80x = 29,667.90 × 8,684.52
  4. Step 4: Simplify right side
    19,780.80x = 257,651,470.91
  5. Step 5: Solve for x
    x = 257,651,470.91/19,780.80
  6. Step 6: Final answer
    x = 13,025.33

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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.