Home / 20,905.38-31,360.95-7,756.65

Finding the Fourth Proportional to 20,905.38, 31,360.95 and 7,756.65

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Solution

The fourth proportional to 20,905.38, 31,360.95 and 7,756.65 is: 11,636.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.38 : 31,360.95 = 7,756.65 : x
  2. Step 2: Convert to fraction form
    20,905.38/31,360.95 = 7,756.65/x
  3. Step 3: Cross multiply
    20,905.38x = 31,360.95 × 7,756.65
  4. Step 4: Simplify right side
    20,905.38x = 243,255,912.82
  5. Step 5: Solve for x
    x = 243,255,912.82/20,905.38
  6. Step 6: Final answer
    x = 11,636.04

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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.