Home / 28,251.18-38,986.94-15,503.99

Finding the Fourth Proportional to 28,251.18, 38,986.94 and 15,503.99

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Solution

The fourth proportional to 28,251.18, 38,986.94 and 15,503.99 is: 21,395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251.18 : 38,986.94 = 15,503.99 : x
  2. Step 2: Convert to fraction form
    28,251.18/38,986.94 = 15,503.99/x
  3. Step 3: Cross multiply
    28,251.18x = 38,986.94 × 15,503.99
  4. Step 4: Simplify right side
    28,251.18x = 604,452,855.44
  5. Step 5: Solve for x
    x = 604,452,855.44/28,251.18
  6. Step 6: Final answer
    x = 21,395.67

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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.