Home / 20,945.70-31,421.93-6,901.65

Finding the Fourth Proportional to 20,945.70, 31,421.93 and 6,901.65

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Solution

The fourth proportional to 20,945.70, 31,421.93 and 6,901.65 is: 10,353.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.70 : 31,421.93 = 6,901.65 : x
  2. Step 2: Convert to fraction form
    20,945.70/31,421.93 = 6,901.65/x
  3. Step 3: Cross multiply
    20,945.70x = 31,421.93 × 6,901.65
  4. Step 4: Simplify right side
    20,945.70x = 216,863,128.68
  5. Step 5: Solve for x
    x = 216,863,128.68/20,945.70
  6. Step 6: Final answer
    x = 10,353.59

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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.