Home / 20,989.63-28,956.31-14,181.45

Finding the Fourth Proportional to 20,989.63, 28,956.31 and 14,181.45

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Solution

The fourth proportional to 20,989.63, 28,956.31 and 14,181.45 is: 19,564.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.63 : 28,956.31 = 14,181.45 : x
  2. Step 2: Convert to fraction form
    20,989.63/28,956.31 = 14,181.45/x
  3. Step 3: Cross multiply
    20,989.63x = 28,956.31 × 14,181.45
  4. Step 4: Simplify right side
    20,989.63x = 410,642,497.90
  5. Step 5: Solve for x
    x = 410,642,497.90/20,989.63
  6. Step 6: Final answer
    x = 19,564.07

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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.