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Finding the Fourth Proportional to 18,858.69, 26,057.84 and 15,498.95

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Solution

The fourth proportional to 18,858.69, 26,057.84 and 15,498.95 is: 21,415.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.69 : 26,057.84 = 15,498.95 : x
  2. Step 2: Convert to fraction form
    18,858.69/26,057.84 = 15,498.95/x
  3. Step 3: Cross multiply
    18,858.69x = 26,057.84 × 15,498.95
  4. Step 4: Simplify right side
    18,858.69x = 403,868,951.48
  5. Step 5: Solve for x
    x = 403,868,951.48/18,858.69
  6. Step 6: Final answer
    x = 21,415.54

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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.