Home / 21,010.07-31,515.11-5,427.70

Finding the Fourth Proportional to 21,010.07, 31,515.11 and 5,427.70

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Solution

The fourth proportional to 21,010.07, 31,515.11 and 5,427.70 is: 8,141.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.07 : 31,515.11 = 5,427.70 : x
  2. Step 2: Convert to fraction form
    21,010.07/31,515.11 = 5,427.70/x
  3. Step 3: Cross multiply
    21,010.07x = 31,515.11 × 5,427.70
  4. Step 4: Simplify right side
    21,010.07x = 171,054,377.83
  5. Step 5: Solve for x
    x = 171,054,377.83/21,010.07
  6. Step 6: Final answer
    x = 8,141.54

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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.