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Finding the Fourth Proportional to 21,059.48, 29,049.90 and 13,607.48

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Solution

The fourth proportional to 21,059.48, 29,049.90 and 13,607.48 is: 18,770.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,059.48 : 29,049.90 = 13,607.48 : x
  2. Step 2: Convert to fraction form
    21,059.48/29,049.90 = 13,607.48/x
  3. Step 3: Cross multiply
    21,059.48x = 29,049.90 × 13,607.48
  4. Step 4: Simplify right side
    21,059.48x = 395,295,933.25
  5. Step 5: Solve for x
    x = 395,295,933.25/21,059.48
  6. Step 6: Final answer
    x = 18,770.45

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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.