Home / 7,870.23-11,811.42-3,490.70

Finding the Fourth Proportional to 7,870.23, 11,811.42 and 3,490.70

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Solution

The fourth proportional to 7,870.23, 11,811.42 and 3,490.70 is: 5,238.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.23 : 11,811.42 = 3,490.70 : x
  2. Step 2: Convert to fraction form
    7,870.23/11,811.42 = 3,490.70/x
  3. Step 3: Cross multiply
    7,870.23x = 11,811.42 × 3,490.70
  4. Step 4: Simplify right side
    7,870.23x = 41,230,064.74
  5. Step 5: Solve for x
    x = 41,230,064.74/7,870.23
  6. Step 6: Final answer
    x = 5,238.74

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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.