Home / 20,789.45-28,681.29-12,817.83

Finding the Fourth Proportional to 20,789.45, 28,681.29 and 12,817.83

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Solution

The fourth proportional to 20,789.45, 28,681.29 and 12,817.83 is: 17,683.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.45 : 28,681.29 = 12,817.83 : x
  2. Step 2: Convert to fraction form
    20,789.45/28,681.29 = 12,817.83/x
  3. Step 3: Cross multiply
    20,789.45x = 28,681.29 × 12,817.83
  4. Step 4: Simplify right side
    20,789.45x = 367,631,899.40
  5. Step 5: Solve for x
    x = 367,631,899.40/20,789.45
  6. Step 6: Final answer
    x = 17,683.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.