Home / 21,271.38-29,352.71-12,538.65

Finding the Fourth Proportional to 21,271.38, 29,352.71 and 12,538.65

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Solution

The fourth proportional to 21,271.38, 29,352.71 and 12,538.65 is: 17,302.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.38 : 29,352.71 = 12,538.65 : x
  2. Step 2: Convert to fraction form
    21,271.38/29,352.71 = 12,538.65/x
  3. Step 3: Cross multiply
    21,271.38x = 29,352.71 × 12,538.65
  4. Step 4: Simplify right side
    21,271.38x = 368,043,498.66
  5. Step 5: Solve for x
    x = 368,043,498.66/21,271.38
  6. Step 6: Final answer
    x = 17,302.28

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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.