Home / 21,998-30,370.96-15,281.36

Finding the Fourth Proportional to 21,998, 30,370.96 and 15,281.36

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Solution

The fourth proportional to 21,998, 30,370.96 and 15,281.36 is: 21,097.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998 : 30,370.96 = 15,281.36 : x
  2. Step 2: Convert to fraction form
    21,998/30,370.96 = 15,281.36/x
  3. Step 3: Cross multiply
    21,998x = 30,370.96 × 15,281.36
  4. Step 4: Simplify right side
    21,998x = 464,109,573.31
  5. Step 5: Solve for x
    x = 464,109,573.31/21,998
  6. Step 6: Final answer
    x = 21,097.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.