Home / 13,521.71-18,650.57-12,406.34

Finding the Fourth Proportional to 13,521.71, 18,650.57 and 12,406.34

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Solution

The fourth proportional to 13,521.71, 18,650.57 and 12,406.34 is: 17,112.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.71 : 18,650.57 = 12,406.34 : x
  2. Step 2: Convert to fraction form
    13,521.71/18,650.57 = 12,406.34/x
  3. Step 3: Cross multiply
    13,521.71x = 18,650.57 × 12,406.34
  4. Step 4: Simplify right side
    13,521.71x = 231,385,157.33
  5. Step 5: Solve for x
    x = 231,385,157.33/13,521.71
  6. Step 6: Final answer
    x = 17,112.13

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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.