Home / 15,373.08-21,195.72-12,821.97

Finding the Fourth Proportional to 15,373.08, 21,195.72 and 12,821.97

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Solution

The fourth proportional to 15,373.08, 21,195.72 and 12,821.97 is: 17,678.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,373.08 : 21,195.72 = 12,821.97 : x
  2. Step 2: Convert to fraction form
    15,373.08/21,195.72 = 12,821.97/x
  3. Step 3: Cross multiply
    15,373.08x = 21,195.72 × 12,821.97
  4. Step 4: Simplify right side
    15,373.08x = 271,770,885.97
  5. Step 5: Solve for x
    x = 271,770,885.97/15,373.08
  6. Step 6: Final answer
    x = 17,678.36

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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.