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Finding the Fourth Proportional to 14,279.80, 21,413.04 and 7,614.64

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Solution

The fourth proportional to 14,279.80, 21,413.04 and 7,614.64 is: 11,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,279.80 : 21,413.04 = 7,614.64 : x
  2. Step 2: Convert to fraction form
    14,279.80/21,413.04 = 7,614.64/x
  3. Step 3: Cross multiply
    14,279.80x = 21,413.04 × 7,614.64
  4. Step 4: Simplify right side
    14,279.80x = 163,052,590.91
  5. Step 5: Solve for x
    x = 163,052,590.91/14,279.80
  6. Step 6: Final answer
    x = 11,418.41

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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.