Home / 21,838.79-30,140.04-12,149.21

Finding the Fourth Proportional to 21,838.79, 30,140.04 and 12,149.21

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Solution

The fourth proportional to 21,838.79, 30,140.04 and 12,149.21 is: 16,767.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,838.79 : 30,140.04 = 12,149.21 : x
  2. Step 2: Convert to fraction form
    21,838.79/30,140.04 = 12,149.21/x
  3. Step 3: Cross multiply
    21,838.79x = 30,140.04 × 12,149.21
  4. Step 4: Simplify right side
    21,838.79x = 366,177,675.37
  5. Step 5: Solve for x
    x = 366,177,675.37/21,838.79
  6. Step 6: Final answer
    x = 16,767.31

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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.