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Finding the Fourth Proportional to 21,607.75, 32,411.63 and 7,015.75

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Solution

The fourth proportional to 21,607.75, 32,411.63 and 7,015.75 is: 10,523.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,607.75 : 32,411.63 = 7,015.75 : x
  2. Step 2: Convert to fraction form
    21,607.75/32,411.63 = 7,015.75/x
  3. Step 3: Cross multiply
    21,607.75x = 32,411.63 × 7,015.75
  4. Step 4: Simplify right side
    21,607.75x = 227,391,858.09
  5. Step 5: Solve for x
    x = 227,391,858.09/21,607.75
  6. Step 6: Final answer
    x = 10,523.63

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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.