Home / 20,918.85-28,843.67-14,208.81

Finding the Fourth Proportional to 20,918.85, 28,843.67 and 14,208.81

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Solution

The fourth proportional to 20,918.85, 28,843.67 and 14,208.81 is: 19,591.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.85 : 28,843.67 = 14,208.81 : x
  2. Step 2: Convert to fraction form
    20,918.85/28,843.67 = 14,208.81/x
  3. Step 3: Cross multiply
    20,918.85x = 28,843.67 × 14,208.81
  4. Step 4: Simplify right side
    20,918.85x = 409,834,155.69
  5. Step 5: Solve for x
    x = 409,834,155.69/20,918.85
  6. Step 6: Final answer
    x = 19,591.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.