Home / 21,750.07-30,017.21-12,191.58

Finding the Fourth Proportional to 21,750.07, 30,017.21 and 12,191.58

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Solution

The fourth proportional to 21,750.07, 30,017.21 and 12,191.58 is: 16,825.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.07 : 30,017.21 = 12,191.58 : x
  2. Step 2: Convert to fraction form
    21,750.07/30,017.21 = 12,191.58/x
  3. Step 3: Cross multiply
    21,750.07x = 30,017.21 × 12,191.58
  4. Step 4: Simplify right side
    21,750.07x = 365,957,268.70
  5. Step 5: Solve for x
    x = 365,957,268.70/21,750.07
  6. Step 6: Final answer
    x = 16,825.57

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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.