Home / 11,280.60-16,920.90-7,125.30

Finding the Fourth Proportional to 11,280.60, 16,920.90 and 7,125.30

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Solution

The fourth proportional to 11,280.60, 16,920.90 and 7,125.30 is: 10,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.60 : 16,920.90 = 7,125.30 : x
  2. Step 2: Convert to fraction form
    11,280.60/16,920.90 = 7,125.30/x
  3. Step 3: Cross multiply
    11,280.60x = 16,920.90 × 7,125.30
  4. Step 4: Simplify right side
    11,280.60x = 120,566,488.77
  5. Step 5: Solve for x
    x = 120,566,488.77/11,280.60
  6. Step 6: Final answer
    x = 10,687.95

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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.