Home / 21,418.64-32,121.80-7,378.10

Finding the Fourth Proportional to 21,418.64, 32,121.80 and 7,378.10

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Solution

The fourth proportional to 21,418.64, 32,121.80 and 7,378.10 is: 11,065.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.64 : 32,121.80 = 7,378.10 : x
  2. Step 2: Convert to fraction form
    21,418.64/32,121.80 = 7,378.10/x
  3. Step 3: Cross multiply
    21,418.64x = 32,121.80 × 7,378.10
  4. Step 4: Simplify right side
    21,418.64x = 236,997,815.69
  5. Step 5: Solve for x
    x = 236,997,815.69/21,418.64
  6. Step 6: Final answer
    x = 11,065.03

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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.