Home / 21,977.76-30,328.20-13,026

Finding the Fourth Proportional to 21,977.76, 30,328.20 and 13,026

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Solution

The fourth proportional to 21,977.76, 30,328.20 and 13,026 is: 17,975.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.76 : 30,328.20 = 13,026 : x
  2. Step 2: Convert to fraction form
    21,977.76/30,328.20 = 13,026/x
  3. Step 3: Cross multiply
    21,977.76x = 30,328.20 × 13,026
  4. Step 4: Simplify right side
    21,977.76x = 395,055,133.20
  5. Step 5: Solve for x
    x = 395,055,133.20/21,977.76
  6. Step 6: Final answer
    x = 17,975.22

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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.