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Finding the Fourth Proportional to 28,097.88, 38,776.89 and 15,522.63

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Solution

The fourth proportional to 28,097.88, 38,776.89 and 15,522.63 is: 21,422.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,097.88 : 38,776.89 = 15,522.63 : x
  2. Step 2: Convert to fraction form
    28,097.88/38,776.89 = 15,522.63/x
  3. Step 3: Cross multiply
    28,097.88x = 38,776.89 × 15,522.63
  4. Step 4: Simplify right side
    28,097.88x = 601,919,316.02
  5. Step 5: Solve for x
    x = 601,919,316.02/28,097.88
  6. Step 6: Final answer
    x = 21,422.23

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Half scale
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Double scale
Find fourth proportional to 28,098.88, 38,778.27 and 15,523.63
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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.