Home / 13,433.78-20,015.65-12,679.25

Finding the Fourth Proportional to 13,433.78, 20,015.65 and 12,679.25

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Solution

The fourth proportional to 13,433.78, 20,015.65 and 12,679.25 is: 18,891.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,433.78 : 20,015.65 = 12,679.25 : x
  2. Step 2: Convert to fraction form
    13,433.78/20,015.65 = 12,679.25/x
  3. Step 3: Cross multiply
    13,433.78x = 20,015.65 × 12,679.25
  4. Step 4: Simplify right side
    13,433.78x = 253,783,430.26
  5. Step 5: Solve for x
    x = 253,783,430.26/13,433.78
  6. Step 6: Final answer
    x = 18,891.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.