Home / 12,139.70-18,166.35-11,102.90

Finding the Fourth Proportional to 12,139.70, 18,166.35 and 11,102.90

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Solution

The fourth proportional to 12,139.70, 18,166.35 and 11,102.90 is: 16,614.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.70 : 18,166.35 = 11,102.90 : x
  2. Step 2: Convert to fraction form
    12,139.70/18,166.35 = 11,102.90/x
  3. Step 3: Cross multiply
    12,139.70x = 18,166.35 × 11,102.90
  4. Step 4: Simplify right side
    12,139.70x = 201,699,167.42
  5. Step 5: Solve for x
    x = 201,699,167.42/12,139.70
  6. Step 6: Final answer
    x = 16,614.84

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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.