Home / 21,382.34-29,504.13-19,661.90

Finding the Fourth Proportional to 21,382.34, 29,504.13 and 19,661.90

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Solution

The fourth proportional to 21,382.34, 29,504.13 and 19,661.90 is: 27,130.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,382.34 : 29,504.13 = 19,661.90 : x
  2. Step 2: Convert to fraction form
    21,382.34/29,504.13 = 19,661.90/x
  3. Step 3: Cross multiply
    21,382.34x = 29,504.13 × 19,661.90
  4. Step 4: Simplify right side
    21,382.34x = 580,107,253.65
  5. Step 5: Solve for x
    x = 580,107,253.65/21,382.34
  6. Step 6: Final answer
    x = 27,130.20

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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.