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Finding the Fourth Proportional to 21,388.63, 32,070.63 and 8,239.29

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Solution

The fourth proportional to 21,388.63, 32,070.63 and 8,239.29 is: 12,354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.63 : 32,070.63 = 8,239.29 : x
  2. Step 2: Convert to fraction form
    21,388.63/32,070.63 = 8,239.29/x
  3. Step 3: Cross multiply
    21,388.63x = 32,070.63 × 8,239.29
  4. Step 4: Simplify right side
    21,388.63x = 264,239,221.05
  5. Step 5: Solve for x
    x = 264,239,221.05/21,388.63
  6. Step 6: Final answer
    x = 12,354.19

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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.