Home / 8,379.20-11,566.50-6,289.40

Finding the Fourth Proportional to 8,379.20, 11,566.50 and 6,289.40

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Solution

The fourth proportional to 8,379.20, 11,566.50 and 6,289.40 is: 8,681.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,379.20 : 11,566.50 = 6,289.40 : x
  2. Step 2: Convert to fraction form
    8,379.20/11,566.50 = 6,289.40/x
  3. Step 3: Cross multiply
    8,379.20x = 11,566.50 × 6,289.40
  4. Step 4: Simplify right side
    8,379.20x = 72,746,345.10
  5. Step 5: Solve for x
    x = 72,746,345.10/8,379.20
  6. Step 6: Final answer
    x = 8,681.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.