Home / 21,735.84-29,993.76-12,783.68

Finding the Fourth Proportional to 21,735.84, 29,993.76 and 12,783.68

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Solution

The fourth proportional to 21,735.84, 29,993.76 and 12,783.68 is: 17,640.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,735.84 : 29,993.76 = 12,783.68 : x
  2. Step 2: Convert to fraction form
    21,735.84/29,993.76 = 12,783.68/x
  3. Step 3: Cross multiply
    21,735.84x = 29,993.76 × 12,783.68
  4. Step 4: Simplify right side
    21,735.84x = 383,430,629.84
  5. Step 5: Solve for x
    x = 383,430,629.84/21,735.84
  6. Step 6: Final answer
    x = 17,640.48

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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.