Home / 12,288.80-18,430.01-3,521.66

Finding the Fourth Proportional to 12,288.80, 18,430.01 and 3,521.66

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Solution

The fourth proportional to 12,288.80, 18,430.01 and 3,521.66 is: 5,281.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.80 : 18,430.01 = 3,521.66 : x
  2. Step 2: Convert to fraction form
    12,288.80/18,430.01 = 3,521.66/x
  3. Step 3: Cross multiply
    12,288.80x = 18,430.01 × 3,521.66
  4. Step 4: Simplify right side
    12,288.80x = 64,904,119.26
  5. Step 5: Solve for x
    x = 64,904,119.26/12,288.80
  6. Step 6: Final answer
    x = 5,281.57

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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.