Home / 13,431.60-20,139.52-4,068.80

Finding the Fourth Proportional to 13,431.60, 20,139.52 and 4,068.80

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Solution

The fourth proportional to 13,431.60, 20,139.52 and 4,068.80 is: 6,100.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.60 : 20,139.52 = 4,068.80 : x
  2. Step 2: Convert to fraction form
    13,431.60/20,139.52 = 4,068.80/x
  3. Step 3: Cross multiply
    13,431.60x = 20,139.52 × 4,068.80
  4. Step 4: Simplify right side
    13,431.60x = 81,943,678.98
  5. Step 5: Solve for x
    x = 81,943,678.98/13,431.60
  6. Step 6: Final answer
    x = 6,100.81

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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.