Home / 8,720.40-13,087.80-4,047.60

Finding the Fourth Proportional to 8,720.40, 13,087.80 and 4,047.60

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Solution

The fourth proportional to 8,720.40, 13,087.80 and 4,047.60 is: 6,074.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.40 : 13,087.80 = 4,047.60 : x
  2. Step 2: Convert to fraction form
    8,720.40/13,087.80 = 4,047.60/x
  3. Step 3: Cross multiply
    8,720.40x = 13,087.80 × 4,047.60
  4. Step 4: Simplify right side
    8,720.40x = 52,974,179.28
  5. Step 5: Solve for x
    x = 52,974,179.28/8,720.40
  6. Step 6: Final answer
    x = 6,074.74

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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.