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Finding the Fourth Proportional to 8,589.36, 12,880.80 and 3,655.92

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Solution

The fourth proportional to 8,589.36, 12,880.80 and 3,655.92 is: 5,482.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,589.36 : 12,880.80 = 3,655.92 : x
  2. Step 2: Convert to fraction form
    8,589.36/12,880.80 = 3,655.92/x
  3. Step 3: Cross multiply
    8,589.36x = 12,880.80 × 3,655.92
  4. Step 4: Simplify right side
    8,589.36x = 47,091,174.34
  5. Step 5: Solve for x
    x = 47,091,174.34/8,589.36
  6. Step 6: Final answer
    x = 5,482.50

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1.5x scale

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.