Home / 15,504.85-21,396.85-8,431.43

Finding the Fourth Proportional to 15,504.85, 21,396.85 and 8,431.43

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Solution

The fourth proportional to 15,504.85, 21,396.85 and 8,431.43 is: 11,635.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.85 : 21,396.85 = 8,431.43 : x
  2. Step 2: Convert to fraction form
    15,504.85/21,396.85 = 8,431.43/x
  3. Step 3: Cross multiply
    15,504.85x = 21,396.85 × 8,431.43
  4. Step 4: Simplify right side
    15,504.85x = 180,406,043.00
  5. Step 5: Solve for x
    x = 180,406,043.00/15,504.85
  6. Step 6: Final answer
    x = 11,635.46

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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.