Home / 13,339.13-20,009.72-3,978.43

Finding the Fourth Proportional to 13,339.13, 20,009.72 and 3,978.43

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Solution

The fourth proportional to 13,339.13, 20,009.72 and 3,978.43 is: 5,967.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,339.13 : 20,009.72 = 3,978.43 : x
  2. Step 2: Convert to fraction form
    13,339.13/20,009.72 = 3,978.43/x
  3. Step 3: Cross multiply
    13,339.13x = 20,009.72 × 3,978.43
  4. Step 4: Simplify right side
    13,339.13x = 79,607,270.34
  5. Step 5: Solve for x
    x = 79,607,270.34/13,339.13
  6. Step 6: Final answer
    x = 5,967.95

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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.