Home / 13,219.40-18,250.98-8,749.38

Finding the Fourth Proportional to 13,219.40, 18,250.98 and 8,749.38

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Solution

The fourth proportional to 13,219.40, 18,250.98 and 8,749.38 is: 12,079.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.40 : 18,250.98 = 8,749.38 : x
  2. Step 2: Convert to fraction form
    13,219.40/18,250.98 = 8,749.38/x
  3. Step 3: Cross multiply
    13,219.40x = 18,250.98 × 8,749.38
  4. Step 4: Simplify right side
    13,219.40x = 159,684,759.39
  5. Step 5: Solve for x
    x = 159,684,759.39/13,219.40
  6. Step 6: Final answer
    x = 12,079.58

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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.