Home / 30,578.13-45,898.30-21,091.11

Finding the Fourth Proportional to 30,578.13, 45,898.30 and 21,091.11

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Solution

The fourth proportional to 30,578.13, 45,898.30 and 21,091.11 is: 31,658.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,578.13 : 45,898.30 = 21,091.11 : x
  2. Step 2: Convert to fraction form
    30,578.13/45,898.30 = 21,091.11/x
  3. Step 3: Cross multiply
    30,578.13x = 45,898.30 × 21,091.11
  4. Step 4: Simplify right side
    30,578.13x = 968,045,958.81
  5. Step 5: Solve for x
    x = 968,045,958.81/30,578.13
  6. Step 6: Final answer
    x = 31,658.11

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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.