Home / 21,530.75-29,710.40-12,453.80

Finding the Fourth Proportional to 21,530.75, 29,710.40 and 12,453.80

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Solution

The fourth proportional to 21,530.75, 29,710.40 and 12,453.80 is: 17,185.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.75 : 29,710.40 = 12,453.80 : x
  2. Step 2: Convert to fraction form
    21,530.75/29,710.40 = 12,453.80/x
  3. Step 3: Cross multiply
    21,530.75x = 29,710.40 × 12,453.80
  4. Step 4: Simplify right side
    21,530.75x = 370,007,168.70
  5. Step 5: Solve for x
    x = 370,007,168.70/21,530.75
  6. Step 6: Final answer
    x = 17,185.06

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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.