Home / 21,220.29-29,303.69-13,684.25

Finding the Fourth Proportional to 21,220.29, 29,303.69 and 13,684.25

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Solution

The fourth proportional to 21,220.29, 29,303.69 and 13,684.25 is: 18,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.29 : 29,303.69 = 13,684.25 : x
  2. Step 2: Convert to fraction form
    21,220.29/29,303.69 = 13,684.25/x
  3. Step 3: Cross multiply
    21,220.29x = 29,303.69 × 13,684.25
  4. Step 4: Simplify right side
    21,220.29x = 400,998,804.94
  5. Step 5: Solve for x
    x = 400,998,804.94/21,220.29
  6. Step 6: Final answer
    x = 18,896.95

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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.