Home / 28,311.40-39,071.92-16,981.34

Finding the Fourth Proportional to 28,311.40, 39,071.92 and 16,981.34

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Solution

The fourth proportional to 28,311.40, 39,071.92 and 16,981.34 is: 23,435.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.40 : 39,071.92 = 16,981.34 : x
  2. Step 2: Convert to fraction form
    28,311.40/39,071.92 = 16,981.34/x
  3. Step 3: Cross multiply
    28,311.40x = 39,071.92 × 16,981.34
  4. Step 4: Simplify right side
    28,311.40x = 663,493,557.97
  5. Step 5: Solve for x
    x = 663,493,557.97/28,311.40
  6. Step 6: Final answer
    x = 23,435.56

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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.