Home / 21,119.08-31,615.50-12,773.85

Finding the Fourth Proportional to 21,119.08, 31,615.50 and 12,773.85

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Solution

The fourth proportional to 21,119.08, 31,615.50 and 12,773.85 is: 19,122.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.08 : 31,615.50 = 12,773.85 : x
  2. Step 2: Convert to fraction form
    21,119.08/31,615.50 = 12,773.85/x
  3. Step 3: Cross multiply
    21,119.08x = 31,615.50 × 12,773.85
  4. Step 4: Simplify right side
    21,119.08x = 403,851,654.68
  5. Step 5: Solve for x
    x = 403,851,654.68/21,119.08
  6. Step 6: Final answer
    x = 19,122.60

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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.