Home / 21,330.90-31,997.16-8,184.60

Finding the Fourth Proportional to 21,330.90, 31,997.16 and 8,184.60

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Solution

The fourth proportional to 21,330.90, 31,997.16 and 8,184.60 is: 12,277.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.90 : 31,997.16 = 8,184.60 : x
  2. Step 2: Convert to fraction form
    21,330.90/31,997.16 = 8,184.60/x
  3. Step 3: Cross multiply
    21,330.90x = 31,997.16 × 8,184.60
  4. Step 4: Simplify right side
    21,330.90x = 261,883,955.74
  5. Step 5: Solve for x
    x = 261,883,955.74/21,330.90
  6. Step 6: Final answer
    x = 12,277.21

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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.