Home / 9,420.88-13,000.97-5,172.34

Finding the Fourth Proportional to 9,420.88, 13,000.97 and 5,172.34

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Solution

The fourth proportional to 9,420.88, 13,000.97 and 5,172.34 is: 7,137.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,420.88 : 13,000.97 = 5,172.34 : x
  2. Step 2: Convert to fraction form
    9,420.88/13,000.97 = 5,172.34/x
  3. Step 3: Cross multiply
    9,420.88x = 13,000.97 × 5,172.34
  4. Step 4: Simplify right side
    9,420.88x = 67,245,385.10
  5. Step 5: Solve for x
    x = 67,245,385.10/9,420.88
  6. Step 6: Final answer
    x = 7,137.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.