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Finding the Fourth Proportional to 8,811.86, 13,211.90 and 4,647.48

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Solution

The fourth proportional to 8,811.86, 13,211.90 and 4,647.48 is: 6,968.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.86 : 13,211.90 = 4,647.48 : x
  2. Step 2: Convert to fraction form
    8,811.86/13,211.90 = 4,647.48/x
  3. Step 3: Cross multiply
    8,811.86x = 13,211.90 × 4,647.48
  4. Step 4: Simplify right side
    8,811.86x = 61,402,041.01
  5. Step 5: Solve for x
    x = 61,402,041.01/8,811.86
  6. Step 6: Final answer
    x = 6,968.11

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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.