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Finding the Fourth Proportional to 21,907.63, 32,866.26 and 7,118.11

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Solution

The fourth proportional to 21,907.63, 32,866.26 and 7,118.11 is: 10,678.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907.63 : 32,866.26 = 7,118.11 : x
  2. Step 2: Convert to fraction form
    21,907.63/32,866.26 = 7,118.11/x
  3. Step 3: Cross multiply
    21,907.63x = 32,866.26 × 7,118.11
  4. Step 4: Simplify right side
    21,907.63x = 233,945,653.97
  5. Step 5: Solve for x
    x = 233,945,653.97/21,907.63
  6. Step 6: Final answer
    x = 10,678.73

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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.