Home / 12,726.40-19,089.60-8,789.80

Finding the Fourth Proportional to 12,726.40, 19,089.60 and 8,789.80

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Solution

The fourth proportional to 12,726.40, 19,089.60 and 8,789.80 is: 13,184.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,726.40 : 19,089.60 = 8,789.80 : x
  2. Step 2: Convert to fraction form
    12,726.40/19,089.60 = 8,789.80/x
  3. Step 3: Cross multiply
    12,726.40x = 19,089.60 × 8,789.80
  4. Step 4: Simplify right side
    12,726.40x = 167,793,766.08
  5. Step 5: Solve for x
    x = 167,793,766.08/12,726.40
  6. Step 6: Final answer
    x = 13,184.70

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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.