Home / 20,690.37-30,876.57-18,475.92

Finding the Fourth Proportional to 20,690.37, 30,876.57 and 18,475.92

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Solution

The fourth proportional to 20,690.37, 30,876.57 and 18,475.92 is: 27,571.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.37 : 30,876.57 = 18,475.92 : x
  2. Step 2: Convert to fraction form
    20,690.37/30,876.57 = 18,475.92/x
  3. Step 3: Cross multiply
    20,690.37x = 30,876.57 × 18,475.92
  4. Step 4: Simplify right side
    20,690.37x = 570,473,037.19
  5. Step 5: Solve for x
    x = 570,473,037.19/20,690.37
  6. Step 6: Final answer
    x = 27,571.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.