Home / 21,195.54-31,776.84-10,515.42

Finding the Fourth Proportional to 21,195.54, 31,776.84 and 10,515.42

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Solution

The fourth proportional to 21,195.54, 31,776.84 and 10,515.42 is: 15,764.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.54 : 31,776.84 = 10,515.42 : x
  2. Step 2: Convert to fraction form
    21,195.54/31,776.84 = 10,515.42/x
  3. Step 3: Cross multiply
    21,195.54x = 31,776.84 × 10,515.42
  4. Step 4: Simplify right side
    21,195.54x = 334,146,818.87
  5. Step 5: Solve for x
    x = 334,146,818.87/21,195.54
  6. Step 6: Final answer
    x = 15,764.96

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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.