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Finding the Fourth Proportional to 21,073.37, 31,605.19 and 7,927.07

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Solution

The fourth proportional to 21,073.37, 31,605.19 and 7,927.07 is: 11,888.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.37 : 31,605.19 = 7,927.07 : x
  2. Step 2: Convert to fraction form
    21,073.37/31,605.19 = 7,927.07/x
  3. Step 3: Cross multiply
    21,073.37x = 31,605.19 × 7,927.07
  4. Step 4: Simplify right side
    21,073.37x = 250,536,375.65
  5. Step 5: Solve for x
    x = 250,536,375.65/21,073.37
  6. Step 6: Final answer
    x = 11,888.77

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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.