Home / 13,790.63-20,678.39-6,391.01

Finding the Fourth Proportional to 13,790.63, 20,678.39 and 6,391.01

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Solution

The fourth proportional to 13,790.63, 20,678.39 and 6,391.01 is: 9,583.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.63 : 20,678.39 = 6,391.01 : x
  2. Step 2: Convert to fraction form
    13,790.63/20,678.39 = 6,391.01/x
  3. Step 3: Cross multiply
    13,790.63x = 20,678.39 × 6,391.01
  4. Step 4: Simplify right side
    13,790.63x = 132,155,817.01
  5. Step 5: Solve for x
    x = 132,155,817.01/13,790.63
  6. Step 6: Final answer
    x = 9,583.01

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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.