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Finding the Fourth Proportional to 14,985.63, 20,679.93 and 8,271.09

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Solution

The fourth proportional to 14,985.63, 20,679.93 and 8,271.09 is: 11,413.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,985.63 : 20,679.93 = 8,271.09 : x
  2. Step 2: Convert to fraction form
    14,985.63/20,679.93 = 8,271.09/x
  3. Step 3: Cross multiply
    14,985.63x = 20,679.93 × 8,271.09
  4. Step 4: Simplify right side
    14,985.63x = 171,045,562.22
  5. Step 5: Solve for x
    x = 171,045,562.22/14,985.63
  6. Step 6: Final answer
    x = 11,413.97

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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.