Home / 11,175.30-15,421.89-6,139.65

Finding the Fourth Proportional to 11,175.30, 15,421.89 and 6,139.65

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Solution

The fourth proportional to 11,175.30, 15,421.89 and 6,139.65 is: 8,472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,175.30 : 15,421.89 = 6,139.65 : x
  2. Step 2: Convert to fraction form
    11,175.30/15,421.89 = 6,139.65/x
  3. Step 3: Cross multiply
    11,175.30x = 15,421.89 × 6,139.65
  4. Step 4: Simplify right side
    11,175.30x = 94,685,006.94
  5. Step 5: Solve for x
    x = 94,685,006.94/11,175.30
  6. Step 6: Final answer
    x = 8,472.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.