Home / 21,813.49-30,103.55-12,382.93

Finding the Fourth Proportional to 21,813.49, 30,103.55 and 12,382.93

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Solution

The fourth proportional to 21,813.49, 30,103.55 and 12,382.93 is: 17,088.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.49 : 30,103.55 = 12,382.93 : x
  2. Step 2: Convert to fraction form
    21,813.49/30,103.55 = 12,382.93/x
  3. Step 3: Cross multiply
    21,813.49x = 30,103.55 × 12,382.93
  4. Step 4: Simplify right side
    21,813.49x = 372,770,152.40
  5. Step 5: Solve for x
    x = 372,770,152.40/21,813.49
  6. Step 6: Final answer
    x = 17,088.97

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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.