Home / 8,720.85-13,080.56-2,875.89

Finding the Fourth Proportional to 8,720.85, 13,080.56 and 2,875.89

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Solution

The fourth proportional to 8,720.85, 13,080.56 and 2,875.89 is: 4,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.85 : 13,080.56 = 2,875.89 : x
  2. Step 2: Convert to fraction form
    8,720.85/13,080.56 = 2,875.89/x
  3. Step 3: Cross multiply
    8,720.85x = 13,080.56 × 2,875.89
  4. Step 4: Simplify right side
    8,720.85x = 37,618,237.32
  5. Step 5: Solve for x
    x = 37,618,237.32/8,720.85
  6. Step 6: Final answer
    x = 4,313.60

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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.