Home / 13,376.68-19,929.41-12,715.72

Finding the Fourth Proportional to 13,376.68, 19,929.41 and 12,715.72

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Solution

The fourth proportional to 13,376.68, 19,929.41 and 12,715.72 is: 18,944.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,376.68 : 19,929.41 = 12,715.72 : x
  2. Step 2: Convert to fraction form
    13,376.68/19,929.41 = 12,715.72/x
  3. Step 3: Cross multiply
    13,376.68x = 19,929.41 × 12,715.72
  4. Step 4: Simplify right side
    13,376.68x = 253,416,797.33
  5. Step 5: Solve for x
    x = 253,416,797.33/13,376.68
  6. Step 6: Final answer
    x = 18,944.67

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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.