Home / 5,286.13-7,929.23-1,390.50

Finding the Fourth Proportional to 5,286.13, 7,929.23 and 1,390.50

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Solution

The fourth proportional to 5,286.13, 7,929.23 and 1,390.50 is: 2,085.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.13 : 7,929.23 = 1,390.50 : x
  2. Step 2: Convert to fraction form
    5,286.13/7,929.23 = 1,390.50/x
  3. Step 3: Cross multiply
    5,286.13x = 7,929.23 × 1,390.50
  4. Step 4: Simplify right side
    5,286.13x = 11,025,587.36
  5. Step 5: Solve for x
    x = 11,025,587.36/5,286.13
  6. Step 6: Final answer
    x = 2,085.76

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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.