Home / 6,459.60-9,690.30-2,078.40

Finding the Fourth Proportional to 6,459.60, 9,690.30 and 2,078.40

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Solution

The fourth proportional to 6,459.60, 9,690.30 and 2,078.40 is: 3,117.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,459.60 : 9,690.30 = 2,078.40 : x
  2. Step 2: Convert to fraction form
    6,459.60/9,690.30 = 2,078.40/x
  3. Step 3: Cross multiply
    6,459.60x = 9,690.30 × 2,078.40
  4. Step 4: Simplify right side
    6,459.60x = 20,140,319.52
  5. Step 5: Solve for x
    x = 20,140,319.52/6,459.60
  6. Step 6: Final answer
    x = 3,117.89

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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.