Home / 11,520.60-15,897.84-6,485.64

Finding the Fourth Proportional to 11,520.60, 15,897.84 and 6,485.64

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Solution

The fourth proportional to 11,520.60, 15,897.84 and 6,485.64 is: 8,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520.60 : 15,897.84 = 6,485.64 : x
  2. Step 2: Convert to fraction form
    11,520.60/15,897.84 = 6,485.64/x
  3. Step 3: Cross multiply
    11,520.60x = 15,897.84 × 6,485.64
  4. Step 4: Simplify right side
    11,520.60x = 103,107,667.02
  5. Step 5: Solve for x
    x = 103,107,667.02/11,520.60
  6. Step 6: Final answer
    x = 8,949.85

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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.