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Finding the Fourth Proportional to 38,402.80, 52,990.63 and 21,405.03

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Solution

The fourth proportional to 38,402.80, 52,990.63 and 21,405.03 is: 29,536.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,402.80 : 52,990.63 = 21,405.03 : x
  2. Step 2: Convert to fraction form
    38,402.80/52,990.63 = 21,405.03/x
  3. Step 3: Cross multiply
    38,402.80x = 52,990.63 × 21,405.03
  4. Step 4: Simplify right side
    38,402.80x = 1,134,265,772.64
  5. Step 5: Solve for x
    x = 1,134,265,772.64/38,402.80
  6. Step 6: Final answer
    x = 29,536.02

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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.