Home / 20,272.47-30,408.70-9,178.91

Finding the Fourth Proportional to 20,272.47, 30,408.70 and 9,178.91

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Solution

The fourth proportional to 20,272.47, 30,408.70 and 9,178.91 is: 13,768.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.47 : 30,408.70 = 9,178.91 : x
  2. Step 2: Convert to fraction form
    20,272.47/30,408.70 = 9,178.91/x
  3. Step 3: Cross multiply
    20,272.47x = 30,408.70 × 9,178.91
  4. Step 4: Simplify right side
    20,272.47x = 279,118,720.52
  5. Step 5: Solve for x
    x = 279,118,720.52/20,272.47
  6. Step 6: Final answer
    x = 13,768.36

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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.