Home / 13,338.46-20,011.23-3,978.51

Finding the Fourth Proportional to 13,338.46, 20,011.23 and 3,978.51

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Solution

The fourth proportional to 13,338.46, 20,011.23 and 3,978.51 is: 5,968.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,338.46 : 20,011.23 = 3,978.51 : x
  2. Step 2: Convert to fraction form
    13,338.46/20,011.23 = 3,978.51/x
  3. Step 3: Cross multiply
    13,338.46x = 20,011.23 × 3,978.51
  4. Step 4: Simplify right side
    13,338.46x = 79,614,878.67
  5. Step 5: Solve for x
    x = 79,614,878.67/13,338.46
  6. Step 6: Final answer
    x = 5,968.82

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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.