Home / 13,212.49-18,222.65-11,615.74

Finding the Fourth Proportional to 13,212.49, 18,222.65 and 11,615.74

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Solution

The fourth proportional to 13,212.49, 18,222.65 and 11,615.74 is: 16,020.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.49 : 18,222.65 = 11,615.74 : x
  2. Step 2: Convert to fraction form
    13,212.49/18,222.65 = 11,615.74/x
  3. Step 3: Cross multiply
    13,212.49x = 18,222.65 × 11,615.74
  4. Step 4: Simplify right side
    13,212.49x = 211,669,572.77
  5. Step 5: Solve for x
    x = 211,669,572.77/13,212.49
  6. Step 6: Final answer
    x = 16,020.42

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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.