Home / 7,890.18-11,835.24-3,210.12

Finding the Fourth Proportional to 7,890.18, 11,835.24 and 3,210.12

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Solution

The fourth proportional to 7,890.18, 11,835.24 and 3,210.12 is: 4,815.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.18 : 11,835.24 = 3,210.12 : x
  2. Step 2: Convert to fraction form
    7,890.18/11,835.24 = 3,210.12/x
  3. Step 3: Cross multiply
    7,890.18x = 11,835.24 × 3,210.12
  4. Step 4: Simplify right side
    7,890.18x = 37,992,540.63
  5. Step 5: Solve for x
    x = 37,992,540.63/7,890.18
  6. Step 6: Final answer
    x = 4,815.17

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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.