Home / 13,638.28-18,822.72-8,604.76

Finding the Fourth Proportional to 13,638.28, 18,822.72 and 8,604.76

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Solution

The fourth proportional to 13,638.28, 18,822.72 and 8,604.76 is: 11,875.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.28 : 18,822.72 = 8,604.76 : x
  2. Step 2: Convert to fraction form
    13,638.28/18,822.72 = 8,604.76/x
  3. Step 3: Cross multiply
    13,638.28x = 18,822.72 × 8,604.76
  4. Step 4: Simplify right side
    13,638.28x = 161,964,988.15
  5. Step 5: Solve for x
    x = 161,964,988.15/13,638.28
  6. Step 6: Final answer
    x = 11,875.76

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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.