Home / 8,558.68-12,816.60-5,429.20

Finding the Fourth Proportional to 8,558.68, 12,816.60 and 5,429.20

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Solution

The fourth proportional to 8,558.68, 12,816.60 and 5,429.20 is: 8,130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,558.68 : 12,816.60 = 5,429.20 : x
  2. Step 2: Convert to fraction form
    8,558.68/12,816.60 = 5,429.20/x
  3. Step 3: Cross multiply
    8,558.68x = 12,816.60 × 5,429.20
  4. Step 4: Simplify right side
    8,558.68x = 69,583,884.72
  5. Step 5: Solve for x
    x = 69,583,884.72/8,558.68
  6. Step 6: Final answer
    x = 8,130.21

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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.