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Finding the Fourth Proportional to 8,762.21, 13,080.89 and 8,454.65

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Solution

The fourth proportional to 8,762.21, 13,080.89 and 8,454.65 is: 12,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.21 : 13,080.89 = 8,454.65 : x
  2. Step 2: Convert to fraction form
    8,762.21/13,080.89 = 8,454.65/x
  3. Step 3: Cross multiply
    8,762.21x = 13,080.89 × 8,454.65
  4. Step 4: Simplify right side
    8,762.21x = 110,594,302.37
  5. Step 5: Solve for x
    x = 110,594,302.37/8,762.21
  6. Step 6: Final answer
    x = 12,621.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.