Home / 5,260.15-7,890.19-1,311.38

Finding the Fourth Proportional to 5,260.15, 7,890.19 and 1,311.38

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Solution

The fourth proportional to 5,260.15, 7,890.19 and 1,311.38 is: 1,967.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,260.15 : 7,890.19 = 1,311.38 : x
  2. Step 2: Convert to fraction form
    5,260.15/7,890.19 = 1,311.38/x
  3. Step 3: Cross multiply
    5,260.15x = 7,890.19 × 1,311.38
  4. Step 4: Simplify right side
    5,260.15x = 10,347,053.81
  5. Step 5: Solve for x
    x = 10,347,053.81/5,260.15
  6. Step 6: Final answer
    x = 1,967.07

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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.