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Finding the Fourth Proportional to 21,620.68, 32,431.04 and 5,204.68

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Solution

The fourth proportional to 21,620.68, 32,431.04 and 5,204.68 is: 7,807.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.68 : 32,431.04 = 5,204.68 : x
  2. Step 2: Convert to fraction form
    21,620.68/32,431.04 = 5,204.68/x
  3. Step 3: Cross multiply
    21,620.68x = 32,431.04 × 5,204.68
  4. Step 4: Simplify right side
    21,620.68x = 168,793,185.27
  5. Step 5: Solve for x
    x = 168,793,185.27/21,620.68
  6. Step 6: Final answer
    x = 7,807.02

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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.