Home / 21,457.41-29,600.69-18,620.80

Finding the Fourth Proportional to 21,457.41, 29,600.69 and 18,620.80

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Solution

The fourth proportional to 21,457.41, 29,600.69 and 18,620.80 is: 25,687.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,457.41 : 29,600.69 = 18,620.80 : x
  2. Step 2: Convert to fraction form
    21,457.41/29,600.69 = 18,620.80/x
  3. Step 3: Cross multiply
    21,457.41x = 29,600.69 × 18,620.80
  4. Step 4: Simplify right side
    21,457.41x = 551,188,528.35
  5. Step 5: Solve for x
    x = 551,188,528.35/21,457.41
  6. Step 6: Final answer
    x = 25,687.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.