Home / 21,288.32-31,914.60-9,271.48

Finding the Fourth Proportional to 21,288.32, 31,914.60 and 9,271.48

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Solution

The fourth proportional to 21,288.32, 31,914.60 and 9,271.48 is: 13,899.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.32 : 31,914.60 = 9,271.48 : x
  2. Step 2: Convert to fraction form
    21,288.32/31,914.60 = 9,271.48/x
  3. Step 3: Cross multiply
    21,288.32x = 31,914.60 × 9,271.48
  4. Step 4: Simplify right side
    21,288.32x = 295,895,575.61
  5. Step 5: Solve for x
    x = 295,895,575.61/21,288.32
  6. Step 6: Final answer
    x = 13,899.43

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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.