Home / 13,010.40-19,515.60-12,880.80

Finding the Fourth Proportional to 13,010.40, 19,515.60 and 12,880.80

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Solution

The fourth proportional to 13,010.40, 19,515.60 and 12,880.80 is: 19,321.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,010.40 : 19,515.60 = 12,880.80 : x
  2. Step 2: Convert to fraction form
    13,010.40/19,515.60 = 12,880.80/x
  3. Step 3: Cross multiply
    13,010.40x = 19,515.60 × 12,880.80
  4. Step 4: Simplify right side
    13,010.40x = 251,376,540.48
  5. Step 5: Solve for x
    x = 251,376,540.48/13,010.40
  6. Step 6: Final answer
    x = 19,321.20

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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.