Home / 13,212.23-19,818.36-3,978.23

Finding the Fourth Proportional to 13,212.23, 19,818.36 and 3,978.23

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Solution

The fourth proportional to 13,212.23, 19,818.36 and 3,978.23 is: 5,967.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.23 : 19,818.36 = 3,978.23 : x
  2. Step 2: Convert to fraction form
    13,212.23/19,818.36 = 3,978.23/x
  3. Step 3: Cross multiply
    13,212.23x = 19,818.36 × 3,978.23
  4. Step 4: Simplify right side
    13,212.23x = 78,841,895.21
  5. Step 5: Solve for x
    x = 78,841,895.21/13,212.23
  6. Step 6: Final answer
    x = 5,967.34

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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.