Home / 20,960.88-28,938-13,896.90

Finding the Fourth Proportional to 20,960.88, 28,938 and 13,896.90

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Solution

The fourth proportional to 20,960.88, 28,938 and 13,896.90 is: 19,185.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.88 : 28,938 = 13,896.90 : x
  2. Step 2: Convert to fraction form
    20,960.88/28,938 = 13,896.90/x
  3. Step 3: Cross multiply
    20,960.88x = 28,938 × 13,896.90
  4. Step 4: Simplify right side
    20,960.88x = 402,148,492.20
  5. Step 5: Solve for x
    x = 402,148,492.20/20,960.88
  6. Step 6: Final answer
    x = 19,185.67

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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.