Home / 21,833.19-30,128.49-12,883.50

Finding the Fourth Proportional to 21,833.19, 30,128.49 and 12,883.50

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Solution

The fourth proportional to 21,833.19, 30,128.49 and 12,883.50 is: 17,778.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,833.19 : 30,128.49 = 12,883.50 : x
  2. Step 2: Convert to fraction form
    21,833.19/30,128.49 = 12,883.50/x
  3. Step 3: Cross multiply
    21,833.19x = 30,128.49 × 12,883.50
  4. Step 4: Simplify right side
    21,833.19x = 388,160,400.92
  5. Step 5: Solve for x
    x = 388,160,400.92/21,833.19
  6. Step 6: Final answer
    x = 17,778.46

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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.