Home / 13,852.80-20,780.82-5,085.72

Finding the Fourth Proportional to 13,852.80, 20,780.82 and 5,085.72

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Solution

The fourth proportional to 13,852.80, 20,780.82 and 5,085.72 is: 7,629.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,852.80 : 20,780.82 = 5,085.72 : x
  2. Step 2: Convert to fraction form
    13,852.80/20,780.82 = 5,085.72/x
  3. Step 3: Cross multiply
    13,852.80x = 20,780.82 × 5,085.72
  4. Step 4: Simplify right side
    13,852.80x = 105,685,431.89
  5. Step 5: Solve for x
    x = 105,685,431.89/13,852.80
  6. Step 6: Final answer
    x = 7,629.17

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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.