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Finding the Fourth Proportional to 21,921.45, 32,896.74 and 8,070.45

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Solution

The fourth proportional to 21,921.45, 32,896.74 and 8,070.45 is: 12,111.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.45 : 32,896.74 = 8,070.45 : x
  2. Step 2: Convert to fraction form
    21,921.45/32,896.74 = 8,070.45/x
  3. Step 3: Cross multiply
    21,921.45x = 32,896.74 × 8,070.45
  4. Step 4: Simplify right side
    21,921.45x = 265,491,495.33
  5. Step 5: Solve for x
    x = 265,491,495.33/21,921.45
  6. Step 6: Final answer
    x = 12,111.04

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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.