Home / 20,518.28-28,299.12-14,853.86

Finding the Fourth Proportional to 20,518.28, 28,299.12 and 14,853.86

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Solution

The fourth proportional to 20,518.28, 28,299.12 and 14,853.86 is: 20,486.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.28 : 28,299.12 = 14,853.86 : x
  2. Step 2: Convert to fraction form
    20,518.28/28,299.12 = 14,853.86/x
  3. Step 3: Cross multiply
    20,518.28x = 28,299.12 × 14,853.86
  4. Step 4: Simplify right side
    20,518.28x = 420,351,166.60
  5. Step 5: Solve for x
    x = 420,351,166.60/20,518.28
  6. Step 6: Final answer
    x = 20,486.67

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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.