Home / 13,190.81-18,208.89-12,835.41

Finding the Fourth Proportional to 13,190.81, 18,208.89 and 12,835.41

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Solution

The fourth proportional to 13,190.81, 18,208.89 and 12,835.41 is: 17,718.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.81 : 18,208.89 = 12,835.41 : x
  2. Step 2: Convert to fraction form
    13,190.81/18,208.89 = 12,835.41/x
  3. Step 3: Cross multiply
    13,190.81x = 18,208.89 × 12,835.41
  4. Step 4: Simplify right side
    13,190.81x = 233,718,568.79
  5. Step 5: Solve for x
    x = 233,718,568.79/13,190.81
  6. Step 6: Final answer
    x = 17,718.29

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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.