Home / 15,211.39-20,991.23-8,838.51

Finding the Fourth Proportional to 15,211.39, 20,991.23 and 8,838.51

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Solution

The fourth proportional to 15,211.39, 20,991.23 and 8,838.51 is: 12,196.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.39 : 20,991.23 = 8,838.51 : x
  2. Step 2: Convert to fraction form
    15,211.39/20,991.23 = 8,838.51/x
  3. Step 3: Cross multiply
    15,211.39x = 20,991.23 × 8,838.51
  4. Step 4: Simplify right side
    15,211.39x = 185,531,270.84
  5. Step 5: Solve for x
    x = 185,531,270.84/15,211.39
  6. Step 6: Final answer
    x = 12,196.87

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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.