Home / 20,680.95-31,021.56-14,090.79

Finding the Fourth Proportional to 20,680.95, 31,021.56 and 14,090.79

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Solution

The fourth proportional to 20,680.95, 31,021.56 and 14,090.79 is: 21,136.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.95 : 31,021.56 = 14,090.79 : x
  2. Step 2: Convert to fraction form
    20,680.95/31,021.56 = 14,090.79/x
  3. Step 3: Cross multiply
    20,680.95x = 31,021.56 × 14,090.79
  4. Step 4: Simplify right side
    20,680.95x = 437,118,287.43
  5. Step 5: Solve for x
    x = 437,118,287.43/20,680.95
  6. Step 6: Final answer
    x = 21,136.28

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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.