Home / 21,128.36-31,697.54-6,896.76

Finding the Fourth Proportional to 21,128.36, 31,697.54 and 6,896.76

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Solution

The fourth proportional to 21,128.36, 31,697.54 and 6,896.76 is: 10,346.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.36 : 31,697.54 = 6,896.76 : x
  2. Step 2: Convert to fraction form
    21,128.36/31,697.54 = 6,896.76/x
  3. Step 3: Cross multiply
    21,128.36x = 31,697.54 × 6,896.76
  4. Step 4: Simplify right side
    21,128.36x = 218,610,325.97
  5. Step 5: Solve for x
    x = 218,610,325.97/21,128.36
  6. Step 6: Final answer
    x = 10,346.77

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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.