Home / 13,638.15-18,821.57-10,275.03

Finding the Fourth Proportional to 13,638.15, 18,821.57 and 10,275.03

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Solution

The fourth proportional to 13,638.15, 18,821.57 and 10,275.03 is: 14,180.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.15 : 18,821.57 = 10,275.03 : x
  2. Step 2: Convert to fraction form
    13,638.15/18,821.57 = 10,275.03/x
  3. Step 3: Cross multiply
    13,638.15x = 18,821.57 × 10,275.03
  4. Step 4: Simplify right side
    13,638.15x = 193,392,145.02
  5. Step 5: Solve for x
    x = 193,392,145.02/13,638.15
  6. Step 6: Final answer
    x = 14,180.23

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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.