Home / 21,074.29-31,518.48-18,750.60

Finding the Fourth Proportional to 21,074.29, 31,518.48 and 18,750.60

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Solution

The fourth proportional to 21,074.29, 31,518.48 and 18,750.60 is: 28,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.29 : 31,518.48 = 18,750.60 : x
  2. Step 2: Convert to fraction form
    21,074.29/31,518.48 = 18,750.60/x
  3. Step 3: Cross multiply
    21,074.29x = 31,518.48 × 18,750.60
  4. Step 4: Simplify right side
    21,074.29x = 590,990,481.40
  5. Step 5: Solve for x
    x = 590,990,481.40/21,074.29
  6. Step 6: Final answer
    x = 28,043.20

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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.