Home / 8,205.48-12,280.38-6,890.64

Finding the Fourth Proportional to 8,205.48, 12,280.38 and 6,890.64

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Solution

The fourth proportional to 8,205.48, 12,280.38 and 6,890.64 is: 10,312.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,205.48 : 12,280.38 = 6,890.64 : x
  2. Step 2: Convert to fraction form
    8,205.48/12,280.38 = 6,890.64/x
  3. Step 3: Cross multiply
    8,205.48x = 12,280.38 × 6,890.64
  4. Step 4: Simplify right side
    8,205.48x = 84,619,677.64
  5. Step 5: Solve for x
    x = 84,619,677.64/8,205.48
  6. Step 6: Final answer
    x = 10,312.58

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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.