Home / 21,990.63-30,351.14-12,559.20

Finding the Fourth Proportional to 21,990.63, 30,351.14 and 12,559.20

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Solution

The fourth proportional to 21,990.63, 30,351.14 and 12,559.20 is: 17,334.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.63 : 30,351.14 = 12,559.20 : x
  2. Step 2: Convert to fraction form
    21,990.63/30,351.14 = 12,559.20/x
  3. Step 3: Cross multiply
    21,990.63x = 30,351.14 × 12,559.20
  4. Step 4: Simplify right side
    21,990.63x = 381,185,907.97
  5. Step 5: Solve for x
    x = 381,185,907.97/21,990.63
  6. Step 6: Final answer
    x = 17,334.01

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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.