Home / 21,139.26-29,185.83-13,184.70

Finding the Fourth Proportional to 21,139.26, 29,185.83 and 13,184.70

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Solution

The fourth proportional to 21,139.26, 29,185.83 and 13,184.70 is: 18,203.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.26 : 29,185.83 = 13,184.70 : x
  2. Step 2: Convert to fraction form
    21,139.26/29,185.83 = 13,184.70/x
  3. Step 3: Cross multiply
    21,139.26x = 29,185.83 × 13,184.70
  4. Step 4: Simplify right side
    21,139.26x = 384,806,412.80
  5. Step 5: Solve for x
    x = 384,806,412.80/21,139.26
  6. Step 6: Final answer
    x = 18,203.40

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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.