Home / 21,181.04-31,771.79-6,390.09

Finding the Fourth Proportional to 21,181.04, 31,771.79 and 6,390.09

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Solution

The fourth proportional to 21,181.04, 31,771.79 and 6,390.09 is: 9,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.04 : 31,771.79 = 6,390.09 : x
  2. Step 2: Convert to fraction form
    21,181.04/31,771.79 = 6,390.09/x
  3. Step 3: Cross multiply
    21,181.04x = 31,771.79 × 6,390.09
  4. Step 4: Simplify right side
    21,181.04x = 203,024,438.70
  5. Step 5: Solve for x
    x = 203,024,438.70/21,181.04
  6. Step 6: Final answer
    x = 9,585.20

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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.