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Finding the Fourth Proportional to 21,818.72, 32,718.36 and 7,958

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Solution

The fourth proportional to 21,818.72, 32,718.36 and 7,958 is: 11,933.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.72 : 32,718.36 = 7,958 : x
  2. Step 2: Convert to fraction form
    21,818.72/32,718.36 = 7,958/x
  3. Step 3: Cross multiply
    21,818.72x = 32,718.36 × 7,958
  4. Step 4: Simplify right side
    21,818.72x = 260,372,708.88
  5. Step 5: Solve for x
    x = 260,372,708.88/21,818.72
  6. Step 6: Final answer
    x = 11,933.45

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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.