Home / 20,789.56-28,631.28-19,455.49

Finding the Fourth Proportional to 20,789.56, 28,631.28 and 19,455.49

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Solution

The fourth proportional to 20,789.56, 28,631.28 and 19,455.49 is: 26,794.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.56 : 28,631.28 = 19,455.49 : x
  2. Step 2: Convert to fraction form
    20,789.56/28,631.28 = 19,455.49/x
  3. Step 3: Cross multiply
    20,789.56x = 28,631.28 × 19,455.49
  4. Step 4: Simplify right side
    20,789.56x = 557,035,581.73
  5. Step 5: Solve for x
    x = 557,035,581.73/20,789.56
  6. Step 6: Final answer
    x = 26,794.01

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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.