Home / 20,889.28-31,345.26-13,852

Finding the Fourth Proportional to 20,889.28, 31,345.26 and 13,852

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Solution

The fourth proportional to 20,889.28, 31,345.26 and 13,852 is: 20,785.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.28 : 31,345.26 = 13,852 : x
  2. Step 2: Convert to fraction form
    20,889.28/31,345.26 = 13,852/x
  3. Step 3: Cross multiply
    20,889.28x = 31,345.26 × 13,852
  4. Step 4: Simplify right side
    20,889.28x = 434,194,541.52
  5. Step 5: Solve for x
    x = 434,194,541.52/20,889.28
  6. Step 6: Final answer
    x = 20,785.52

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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.