Home / 28,372.16-39,135.84-20,401.76

Finding the Fourth Proportional to 28,372.16, 39,135.84 and 20,401.76

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Solution

The fourth proportional to 28,372.16, 39,135.84 and 20,401.76 is: 28,141.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372.16 : 39,135.84 = 20,401.76 : x
  2. Step 2: Convert to fraction form
    28,372.16/39,135.84 = 20,401.76/x
  3. Step 3: Cross multiply
    28,372.16x = 39,135.84 × 20,401.76
  4. Step 4: Simplify right side
    28,372.16x = 798,440,015.08
  5. Step 5: Solve for x
    x = 798,440,015.08/28,372.16
  6. Step 6: Final answer
    x = 28,141.67

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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.