Home / 21,801.15-30,085.65-12,369.69

Finding the Fourth Proportional to 21,801.15, 30,085.65 and 12,369.69

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Solution

The fourth proportional to 21,801.15, 30,085.65 and 12,369.69 is: 17,070.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,801.15 : 30,085.65 = 12,369.69 : x
  2. Step 2: Convert to fraction form
    21,801.15/30,085.65 = 12,369.69/x
  3. Step 3: Cross multiply
    21,801.15x = 30,085.65 × 12,369.69
  4. Step 4: Simplify right side
    21,801.15x = 372,150,163.95
  5. Step 5: Solve for x
    x = 372,150,163.95/21,801.15
  6. Step 6: Final answer
    x = 17,070.21

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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.