Home / 13,828.75-19,084.35-7,780.88

Finding the Fourth Proportional to 13,828.75, 19,084.35 and 7,780.88

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Solution

The fourth proportional to 13,828.75, 19,084.35 and 7,780.88 is: 10,738.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,828.75 : 19,084.35 = 7,780.88 : x
  2. Step 2: Convert to fraction form
    13,828.75/19,084.35 = 7,780.88/x
  3. Step 3: Cross multiply
    13,828.75x = 19,084.35 × 7,780.88
  4. Step 4: Simplify right side
    13,828.75x = 148,493,084.94
  5. Step 5: Solve for x
    x = 148,493,084.94/13,828.75
  6. Step 6: Final answer
    x = 10,738.00

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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.