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Finding the Fourth Proportional to 21,398.43, 32,089.79 and 7,354.48

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Solution

The fourth proportional to 21,398.43, 32,089.79 and 7,354.48 is: 11,029.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.43 : 32,089.79 = 7,354.48 : x
  2. Step 2: Convert to fraction form
    21,398.43/32,089.79 = 7,354.48/x
  3. Step 3: Cross multiply
    21,398.43x = 32,089.79 × 7,354.48
  4. Step 4: Simplify right side
    21,398.43x = 236,003,656.92
  5. Step 5: Solve for x
    x = 236,003,656.92/21,398.43
  6. Step 6: Final answer
    x = 11,029.02

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1.5x scale

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.