Home / 13,211.81-18,235.74-8,173.10

Finding the Fourth Proportional to 13,211.81, 18,235.74 and 8,173.10

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Solution

The fourth proportional to 13,211.81, 18,235.74 and 8,173.10 is: 11,281.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.81 : 18,235.74 = 8,173.10 : x
  2. Step 2: Convert to fraction form
    13,211.81/18,235.74 = 8,173.10/x
  3. Step 3: Cross multiply
    13,211.81x = 18,235.74 × 8,173.10
  4. Step 4: Simplify right side
    13,211.81x = 149,042,435.42
  5. Step 5: Solve for x
    x = 149,042,435.42/13,211.81
  6. Step 6: Final answer
    x = 11,281.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.