Home / 21,588.27-29,791.88-12,515.40

Finding the Fourth Proportional to 21,588.27, 29,791.88 and 12,515.40

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Solution

The fourth proportional to 21,588.27, 29,791.88 and 12,515.40 is: 17,271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,588.27 : 29,791.88 = 12,515.40 : x
  2. Step 2: Convert to fraction form
    21,588.27/29,791.88 = 12,515.40/x
  3. Step 3: Cross multiply
    21,588.27x = 29,791.88 × 12,515.40
  4. Step 4: Simplify right side
    21,588.27x = 372,857,232.38
  5. Step 5: Solve for x
    x = 372,857,232.38/21,588.27
  6. Step 6: Final answer
    x = 17,271.29

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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.