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Finding the Fourth Proportional to 18,791.51, 28,188.16 and 15,498.50

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Solution

The fourth proportional to 18,791.51, 28,188.16 and 15,498.50 is: 23,248.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.51 : 28,188.16 = 15,498.50 : x
  2. Step 2: Convert to fraction form
    18,791.51/28,188.16 = 15,498.50/x
  3. Step 3: Cross multiply
    18,791.51x = 28,188.16 × 15,498.50
  4. Step 4: Simplify right side
    18,791.51x = 436,874,018.07
  5. Step 5: Solve for x
    x = 436,874,018.07/18,791.51
  6. Step 6: Final answer
    x = 23,248.48

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.