Home / 13,431.81-20,155.11-6,506.31

Finding the Fourth Proportional to 13,431.81, 20,155.11 and 6,506.31

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Solution

The fourth proportional to 13,431.81, 20,155.11 and 6,506.31 is: 9,763.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.81 : 20,155.11 = 6,506.31 : x
  2. Step 2: Convert to fraction form
    13,431.81/20,155.11 = 6,506.31/x
  3. Step 3: Cross multiply
    13,431.81x = 20,155.11 × 6,506.31
  4. Step 4: Simplify right side
    13,431.81x = 131,135,393.74
  5. Step 5: Solve for x
    x = 131,135,393.74/13,431.81
  6. Step 6: Final answer
    x = 9,763.05

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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.