Home / 13,215.30-19,821.02-3,852.80

Finding the Fourth Proportional to 13,215.30, 19,821.02 and 3,852.80

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Solution

The fourth proportional to 13,215.30, 19,821.02 and 3,852.80 is: 5,778.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.30 : 19,821.02 = 3,852.80 : x
  2. Step 2: Convert to fraction form
    13,215.30/19,821.02 = 3,852.80/x
  3. Step 3: Cross multiply
    13,215.30x = 19,821.02 × 3,852.80
  4. Step 4: Simplify right side
    13,215.30x = 76,366,381.82
  5. Step 5: Solve for x
    x = 76,366,381.82/13,215.30
  6. Step 6: Final answer
    x = 5,778.64

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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.