Home / 7,421.15-11,118.90-3,905.93

Finding the Fourth Proportional to 7,421.15, 11,118.90 and 3,905.93

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Solution

The fourth proportional to 7,421.15, 11,118.90 and 3,905.93 is: 5,852.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.15 : 11,118.90 = 3,905.93 : x
  2. Step 2: Convert to fraction form
    7,421.15/11,118.90 = 3,905.93/x
  3. Step 3: Cross multiply
    7,421.15x = 11,118.90 × 3,905.93
  4. Step 4: Simplify right side
    7,421.15x = 43,429,645.08
  5. Step 5: Solve for x
    x = 43,429,645.08/7,421.15
  6. Step 6: Final answer
    x = 5,852.14

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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.