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Finding the Fourth Proportional to 21,548.01, 29,735.16 and 12,116.58

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Solution

The fourth proportional to 21,548.01, 29,735.16 and 12,116.58 is: 16,720.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,548.01 : 29,735.16 = 12,116.58 : x
  2. Step 2: Convert to fraction form
    21,548.01/29,735.16 = 12,116.58/x
  3. Step 3: Cross multiply
    21,548.01x = 29,735.16 × 12,116.58
  4. Step 4: Simplify right side
    21,548.01x = 360,288,444.95
  5. Step 5: Solve for x
    x = 360,288,444.95/21,548.01
  6. Step 6: Final answer
    x = 16,720.27

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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.