Home / 8,186.40-12,279.60-4,687.20

Finding the Fourth Proportional to 8,186.40, 12,279.60 and 4,687.20

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Solution

The fourth proportional to 8,186.40, 12,279.60 and 4,687.20 is: 7,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,186.40 : 12,279.60 = 4,687.20 : x
  2. Step 2: Convert to fraction form
    8,186.40/12,279.60 = 4,687.20/x
  3. Step 3: Cross multiply
    8,186.40x = 12,279.60 × 4,687.20
  4. Step 4: Simplify right side
    8,186.40x = 57,556,941.12
  5. Step 5: Solve for x
    x = 57,556,941.12/8,186.40
  6. Step 6: Final answer
    x = 7,030.80

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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.