Home / 20,977.04-31,477.88-7,830.43

Finding the Fourth Proportional to 20,977.04, 31,477.88 and 7,830.43

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Solution

The fourth proportional to 20,977.04, 31,477.88 and 7,830.43 is: 11,750.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,977.04 : 31,477.88 = 7,830.43 : x
  2. Step 2: Convert to fraction form
    20,977.04/31,477.88 = 7,830.43/x
  3. Step 3: Cross multiply
    20,977.04x = 31,477.88 × 7,830.43
  4. Step 4: Simplify right side
    20,977.04x = 246,485,453.83
  5. Step 5: Solve for x
    x = 246,485,453.83/20,977.04
  6. Step 6: Final answer
    x = 11,750.25

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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.