Home / 5,412.40-8,118.60-4,318.90

Finding the Fourth Proportional to 5,412.40, 8,118.60 and 4,318.90

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Solution

The fourth proportional to 5,412.40, 8,118.60 and 4,318.90 is: 6,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.40 : 8,118.60 = 4,318.90 : x
  2. Step 2: Convert to fraction form
    5,412.40/8,118.60 = 4,318.90/x
  3. Step 3: Cross multiply
    5,412.40x = 8,118.60 × 4,318.90
  4. Step 4: Simplify right side
    5,412.40x = 35,063,421.54
  5. Step 5: Solve for x
    x = 35,063,421.54/5,412.40
  6. Step 6: Final answer
    x = 6,478.35

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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.