Home / 21,012.82-31,519.87-7,862.67

Finding the Fourth Proportional to 21,012.82, 31,519.87 and 7,862.67

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Solution

The fourth proportional to 21,012.82, 31,519.87 and 7,862.67 is: 11,794.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.82 : 31,519.87 = 7,862.67 : x
  2. Step 2: Convert to fraction form
    21,012.82/31,519.87 = 7,862.67/x
  3. Step 3: Cross multiply
    21,012.82x = 31,519.87 × 7,862.67
  4. Step 4: Simplify right side
    21,012.82x = 247,830,316.60
  5. Step 5: Solve for x
    x = 247,830,316.60/21,012.82
  6. Step 6: Final answer
    x = 11,794.24

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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.