Home / 21,159.77-29,213.78-13,619.21

Finding the Fourth Proportional to 21,159.77, 29,213.78 and 13,619.21

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Solution

The fourth proportional to 21,159.77, 29,213.78 and 13,619.21 is: 18,803.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.77 : 29,213.78 = 13,619.21 : x
  2. Step 2: Convert to fraction form
    21,159.77/29,213.78 = 13,619.21/x
  3. Step 3: Cross multiply
    21,159.77x = 29,213.78 × 13,619.21
  4. Step 4: Simplify right side
    21,159.77x = 397,868,609.65
  5. Step 5: Solve for x
    x = 397,868,609.65/21,159.77
  6. Step 6: Final answer
    x = 18,803.07

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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.