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Finding the Fourth Proportional to 8,668.08, 12,985.80 and 4,280.40

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Solution

The fourth proportional to 8,668.08, 12,985.80 and 4,280.40 is: 6,412.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668.08 : 12,985.80 = 4,280.40 : x
  2. Step 2: Convert to fraction form
    8,668.08/12,985.80 = 4,280.40/x
  3. Step 3: Cross multiply
    8,668.08x = 12,985.80 × 4,280.40
  4. Step 4: Simplify right side
    8,668.08x = 55,584,418.32
  5. Step 5: Solve for x
    x = 55,584,418.32/8,668.08
  6. Step 6: Final answer
    x = 6,412.54

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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.