Home / 8,279.60-12,419.40-4,769.60

Finding the Fourth Proportional to 8,279.60, 12,419.40 and 4,769.60

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Solution

The fourth proportional to 8,279.60, 12,419.40 and 4,769.60 is: 7,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.60 : 12,419.40 = 4,769.60 : x
  2. Step 2: Convert to fraction form
    8,279.60/12,419.40 = 4,769.60/x
  3. Step 3: Cross multiply
    8,279.60x = 12,419.40 × 4,769.60
  4. Step 4: Simplify right side
    8,279.60x = 59,235,570.24
  5. Step 5: Solve for x
    x = 59,235,570.24/8,279.60
  6. Step 6: Final answer
    x = 7,154.40

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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.