Home / 13,205.72-18,215.70-8,171.48

Finding the Fourth Proportional to 13,205.72, 18,215.70 and 8,171.48

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Solution

The fourth proportional to 13,205.72, 18,215.70 and 8,171.48 is: 11,271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205.72 : 18,215.70 = 8,171.48 : x
  2. Step 2: Convert to fraction form
    13,205.72/18,215.70 = 8,171.48/x
  3. Step 3: Cross multiply
    13,205.72x = 18,215.70 × 8,171.48
  4. Step 4: Simplify right side
    13,205.72x = 148,849,228.24
  5. Step 5: Solve for x
    x = 148,849,228.24/13,205.72
  6. Step 6: Final answer
    x = 11,271.57

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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.