Home / 7,820.15-11,729.75-3,437.64

Finding the Fourth Proportional to 7,820.15, 11,729.75 and 3,437.64

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Solution

The fourth proportional to 7,820.15, 11,729.75 and 3,437.64 is: 5,156.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820.15 : 11,729.75 = 3,437.64 : x
  2. Step 2: Convert to fraction form
    7,820.15/11,729.75 = 3,437.64/x
  3. Step 3: Cross multiply
    7,820.15x = 11,729.75 × 3,437.64
  4. Step 4: Simplify right side
    7,820.15x = 40,322,640.60
  5. Step 5: Solve for x
    x = 40,322,640.60/7,820.15
  6. Step 6: Final answer
    x = 5,156.25

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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.