Home / 7,420.34-11,128.69-3,261.40

Finding the Fourth Proportional to 7,420.34, 11,128.69 and 3,261.40

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Solution

The fourth proportional to 7,420.34, 11,128.69 and 3,261.40 is: 4,891.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.34 : 11,128.69 = 3,261.40 : x
  2. Step 2: Convert to fraction form
    7,420.34/11,128.69 = 3,261.40/x
  3. Step 3: Cross multiply
    7,420.34x = 11,128.69 × 3,261.40
  4. Step 4: Simplify right side
    7,420.34x = 36,295,085.82
  5. Step 5: Solve for x
    x = 36,295,085.82/7,420.34
  6. Step 6: Final answer
    x = 4,891.30

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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.