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Finding the Fourth Proportional to 12,956.91, 19,458.76 and 6,721.23

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Solution

The fourth proportional to 12,956.91, 19,458.76 and 6,721.23 is: 10,093.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956.91 : 19,458.76 = 6,721.23 : x
  2. Step 2: Convert to fraction form
    12,956.91/19,458.76 = 6,721.23/x
  3. Step 3: Cross multiply
    12,956.91x = 19,458.76 × 6,721.23
  4. Step 4: Simplify right side
    12,956.91x = 130,786,741.89
  5. Step 5: Solve for x
    x = 130,786,741.89/12,956.91
  6. Step 6: Final answer
    x = 10,093.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.