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Finding the Fourth Proportional to 18,887.98, 28,307.74 and 15,960.91

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Solution

The fourth proportional to 18,887.98, 28,307.74 and 15,960.91 is: 23,920.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.98 : 28,307.74 = 15,960.91 : x
  2. Step 2: Convert to fraction form
    18,887.98/28,307.74 = 15,960.91/x
  3. Step 3: Cross multiply
    18,887.98x = 28,307.74 × 15,960.91
  4. Step 4: Simplify right side
    18,887.98x = 451,817,290.44
  5. Step 5: Solve for x
    x = 451,817,290.44/18,887.98
  6. Step 6: Final answer
    x = 23,920.89

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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.