Home / 13,419.70-18,521.81-8,571.31

Finding the Fourth Proportional to 13,419.70, 18,521.81 and 8,571.31

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Solution

The fourth proportional to 13,419.70, 18,521.81 and 8,571.31 is: 11,830.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.70 : 18,521.81 = 8,571.31 : x
  2. Step 2: Convert to fraction form
    13,419.70/18,521.81 = 8,571.31/x
  3. Step 3: Cross multiply
    13,419.70x = 18,521.81 × 8,571.31
  4. Step 4: Simplify right side
    13,419.70x = 158,756,175.27
  5. Step 5: Solve for x
    x = 158,756,175.27/13,419.70
  6. Step 6: Final answer
    x = 11,830.08

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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.