Home / 18,813.85-28,218.47-10,920.67

Finding the Fourth Proportional to 18,813.85, 28,218.47 and 10,920.67

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Solution

The fourth proportional to 18,813.85, 28,218.47 and 10,920.67 is: 16,379.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.85 : 28,218.47 = 10,920.67 : x
  2. Step 2: Convert to fraction form
    18,813.85/28,218.47 = 10,920.67/x
  3. Step 3: Cross multiply
    18,813.85x = 28,218.47 × 10,920.67
  4. Step 4: Simplify right side
    18,813.85x = 308,164,598.77
  5. Step 5: Solve for x
    x = 308,164,598.77/18,813.85
  6. Step 6: Final answer
    x = 16,379.67

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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.