Home / 21,854.36-30,148.70-12,895.90

Finding the Fourth Proportional to 21,854.36, 30,148.70 and 12,895.90

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Solution

The fourth proportional to 21,854.36, 30,148.70 and 12,895.90 is: 17,790.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,854.36 : 30,148.70 = 12,895.90 : x
  2. Step 2: Convert to fraction form
    21,854.36/30,148.70 = 12,895.90/x
  3. Step 3: Cross multiply
    21,854.36x = 30,148.70 × 12,895.90
  4. Step 4: Simplify right side
    21,854.36x = 388,794,480.48
  5. Step 5: Solve for x
    x = 388,794,480.48/21,854.36
  6. Step 6: Final answer
    x = 17,790.25

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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.