Home / 13,826.10-20,720.61-12,940.36

Finding the Fourth Proportional to 13,826.10, 20,720.61 and 12,940.36

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Solution

The fourth proportional to 13,826.10, 20,720.61 and 12,940.36 is: 19,393.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,826.10 : 20,720.61 = 12,940.36 : x
  2. Step 2: Convert to fraction form
    13,826.10/20,720.61 = 12,940.36/x
  3. Step 3: Cross multiply
    13,826.10x = 20,720.61 × 12,940.36
  4. Step 4: Simplify right side
    13,826.10x = 268,132,152.82
  5. Step 5: Solve for x
    x = 268,132,152.82/13,826.10
  6. Step 6: Final answer
    x = 19,393.19

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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.