Home / 13,010.20-19,515.30-8,085.40

Finding the Fourth Proportional to 13,010.20, 19,515.30 and 8,085.40

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Solution

The fourth proportional to 13,010.20, 19,515.30 and 8,085.40 is: 12,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,010.20 : 19,515.30 = 8,085.40 : x
  2. Step 2: Convert to fraction form
    13,010.20/19,515.30 = 8,085.40/x
  3. Step 3: Cross multiply
    13,010.20x = 19,515.30 × 8,085.40
  4. Step 4: Simplify right side
    13,010.20x = 157,789,006.62
  5. Step 5: Solve for x
    x = 157,789,006.62/13,010.20
  6. Step 6: Final answer
    x = 12,128.10

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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.