Home / 7,678.60-11,501.70-6,857.80

Finding the Fourth Proportional to 7,678.60, 11,501.70 and 6,857.80

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Solution

The fourth proportional to 7,678.60, 11,501.70 and 6,857.80 is: 10,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.60 : 11,501.70 = 6,857.80 : x
  2. Step 2: Convert to fraction form
    7,678.60/11,501.70 = 6,857.80/x
  3. Step 3: Cross multiply
    7,678.60x = 11,501.70 × 6,857.80
  4. Step 4: Simplify right side
    7,678.60x = 78,876,358.26
  5. Step 5: Solve for x
    x = 78,876,358.26/7,678.60
  6. Step 6: Final answer
    x = 10,272.23

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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.