Home / 20,711.70-31,071.60-8,865.45

Finding the Fourth Proportional to 20,711.70, 31,071.60 and 8,865.45

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Solution

The fourth proportional to 20,711.70, 31,071.60 and 8,865.45 is: 13,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.70 : 31,071.60 = 8,865.45 : x
  2. Step 2: Convert to fraction form
    20,711.70/31,071.60 = 8,865.45/x
  3. Step 3: Cross multiply
    20,711.70x = 31,071.60 × 8,865.45
  4. Step 4: Simplify right side
    20,711.70x = 275,463,716.22
  5. Step 5: Solve for x
    x = 275,463,716.22/20,711.70
  6. Step 6: Final answer
    x = 13,299.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.