Home / 20,828.28-31,242.87-6,788.28

Finding the Fourth Proportional to 20,828.28, 31,242.87 and 6,788.28

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Solution

The fourth proportional to 20,828.28, 31,242.87 and 6,788.28 is: 10,182.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.28 : 31,242.87 = 6,788.28 : x
  2. Step 2: Convert to fraction form
    20,828.28/31,242.87 = 6,788.28/x
  3. Step 3: Cross multiply
    20,828.28x = 31,242.87 × 6,788.28
  4. Step 4: Simplify right side
    20,828.28x = 212,085,349.56
  5. Step 5: Solve for x
    x = 212,085,349.56/20,828.28
  6. Step 6: Final answer
    x = 10,182.57

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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.