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Finding the Fourth Proportional to 10,888.89, 15,019.50 and 8,647.21

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Solution

The fourth proportional to 10,888.89, 15,019.50 and 8,647.21 is: 11,927.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,888.89 : 15,019.50 = 8,647.21 : x
  2. Step 2: Convert to fraction form
    10,888.89/15,019.50 = 8,647.21/x
  3. Step 3: Cross multiply
    10,888.89x = 15,019.50 × 8,647.21
  4. Step 4: Simplify right side
    10,888.89x = 129,876,770.60
  5. Step 5: Solve for x
    x = 129,876,770.60/10,888.89
  6. Step 6: Final answer
    x = 11,927.46

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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.