Home / 20,962.58-31,443.87-5,380.21

Finding the Fourth Proportional to 20,962.58, 31,443.87 and 5,380.21

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Solution

The fourth proportional to 20,962.58, 31,443.87 and 5,380.21 is: 8,070.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.58 : 31,443.87 = 5,380.21 : x
  2. Step 2: Convert to fraction form
    20,962.58/31,443.87 = 5,380.21/x
  3. Step 3: Cross multiply
    20,962.58x = 31,443.87 × 5,380.21
  4. Step 4: Simplify right side
    20,962.58x = 169,174,466.59
  5. Step 5: Solve for x
    x = 169,174,466.59/20,962.58
  6. Step 6: Final answer
    x = 8,070.31

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1.5x scale

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.