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Finding the Fourth Proportional to 8,720.64, 13,080.93 and 3,526.50

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Solution

The fourth proportional to 8,720.64, 13,080.93 and 3,526.50 is: 5,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.64 : 13,080.93 = 3,526.50 : x
  2. Step 2: Convert to fraction form
    8,720.64/13,080.93 = 3,526.50/x
  3. Step 3: Cross multiply
    8,720.64x = 13,080.93 × 3,526.50
  4. Step 4: Simplify right side
    8,720.64x = 46,129,899.65
  5. Step 5: Solve for x
    x = 46,129,899.65/8,720.64
  6. Step 6: Final answer
    x = 5,289.74

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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.