Home / 20,896.69-31,355.81-13,881.55

Finding the Fourth Proportional to 20,896.69, 31,355.81 and 13,881.55

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Solution

The fourth proportional to 20,896.69, 31,355.81 and 13,881.55 is: 20,829.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.69 : 31,355.81 = 13,881.55 : x
  2. Step 2: Convert to fraction form
    20,896.69/31,355.81 = 13,881.55/x
  3. Step 3: Cross multiply
    20,896.69x = 31,355.81 × 13,881.55
  4. Step 4: Simplify right side
    20,896.69x = 435,267,244.31
  5. Step 5: Solve for x
    x = 435,267,244.31/20,896.69
  6. Step 6: Final answer
    x = 20,829.48

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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.