Home / 27,890.70-38,456.64-20,804.82

Finding the Fourth Proportional to 27,890.70, 38,456.64 and 20,804.82

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Solution

The fourth proportional to 27,890.70, 38,456.64 and 20,804.82 is: 28,686.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.70 : 38,456.64 = 20,804.82 : x
  2. Step 2: Convert to fraction form
    27,890.70/38,456.64 = 20,804.82/x
  3. Step 3: Cross multiply
    27,890.70x = 38,456.64 × 20,804.82
  4. Step 4: Simplify right side
    27,890.70x = 800,083,328.79
  5. Step 5: Solve for x
    x = 800,083,328.79/27,890.70
  6. Step 6: Final answer
    x = 28,686.39

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Half scale
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Double scale
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Similar ratio
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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.