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Finding the Fourth Proportional to 7,218.80, 10,830.40 and 3,056.64

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Solution

The fourth proportional to 7,218.80, 10,830.40 and 3,056.64 is: 4,585.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,218.80 : 10,830.40 = 3,056.64 : x
  2. Step 2: Convert to fraction form
    7,218.80/10,830.40 = 3,056.64/x
  3. Step 3: Cross multiply
    7,218.80x = 10,830.40 × 3,056.64
  4. Step 4: Simplify right side
    7,218.80x = 33,104,633.86
  5. Step 5: Solve for x
    x = 33,104,633.86/7,218.80
  6. Step 6: Final answer
    x = 4,585.89

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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.