Home / 19,143.22-28,720.67-9,789.80

Finding the Fourth Proportional to 19,143.22, 28,720.67 and 9,789.80

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Solution

The fourth proportional to 19,143.22, 28,720.67 and 9,789.80 is: 14,687.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,143.22 : 28,720.67 = 9,789.80 : x
  2. Step 2: Convert to fraction form
    19,143.22/28,720.67 = 9,789.80/x
  3. Step 3: Cross multiply
    19,143.22x = 28,720.67 × 9,789.80
  4. Step 4: Simplify right side
    19,143.22x = 281,169,615.17
  5. Step 5: Solve for x
    x = 281,169,615.17/19,143.22
  6. Step 6: Final answer
    x = 14,687.69

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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.