Home / 21,338.51-31,985.60-8,865.32

Finding the Fourth Proportional to 21,338.51, 31,985.60 and 8,865.32

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Solution

The fourth proportional to 21,338.51, 31,985.60 and 8,865.32 is: 13,288.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.51 : 31,985.60 = 8,865.32 : x
  2. Step 2: Convert to fraction form
    21,338.51/31,985.60 = 8,865.32/x
  3. Step 3: Cross multiply
    21,338.51x = 31,985.60 × 8,865.32
  4. Step 4: Simplify right side
    21,338.51x = 283,562,375.14
  5. Step 5: Solve for x
    x = 283,562,375.14/21,338.51
  6. Step 6: Final answer
    x = 13,288.76

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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.