Home / 20,123.87-30,181.49-12,623.81

Finding the Fourth Proportional to 20,123.87, 30,181.49 and 12,623.81

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Solution

The fourth proportional to 20,123.87, 30,181.49 and 12,623.81 is: 18,933.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.87 : 30,181.49 = 12,623.81 : x
  2. Step 2: Convert to fraction form
    20,123.87/30,181.49 = 12,623.81/x
  3. Step 3: Cross multiply
    20,123.87x = 30,181.49 × 12,623.81
  4. Step 4: Simplify right side
    20,123.87x = 381,005,407.61
  5. Step 5: Solve for x
    x = 381,005,407.61/20,123.87
  6. Step 6: Final answer
    x = 18,933.01

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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.