Home / 21,016.60-31,460.10-18,683.80

Finding the Fourth Proportional to 21,016.60, 31,460.10 and 18,683.80

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Solution

The fourth proportional to 21,016.60, 31,460.10 and 18,683.80 is: 27,968.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,016.60 : 31,460.10 = 18,683.80 : x
  2. Step 2: Convert to fraction form
    21,016.60/31,460.10 = 18,683.80/x
  3. Step 3: Cross multiply
    21,016.60x = 31,460.10 × 18,683.80
  4. Step 4: Simplify right side
    21,016.60x = 587,794,216.38
  5. Step 5: Solve for x
    x = 587,794,216.38/21,016.60
  6. Step 6: Final answer
    x = 27,968.09

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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.