Home / 8,579.40-12,890.70-5,460.90

Finding the Fourth Proportional to 8,579.40, 12,890.70 and 5,460.90

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Solution

The fourth proportional to 8,579.40, 12,890.70 and 5,460.90 is: 8,205.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.40 : 12,890.70 = 5,460.90 : x
  2. Step 2: Convert to fraction form
    8,579.40/12,890.70 = 5,460.90/x
  3. Step 3: Cross multiply
    8,579.40x = 12,890.70 × 5,460.90
  4. Step 4: Simplify right side
    8,579.40x = 70,394,823.63
  5. Step 5: Solve for x
    x = 70,394,823.63/8,579.40
  6. Step 6: Final answer
    x = 8,205.10

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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.