Home / 13,322.56-18,385.68-8,289.76

Finding the Fourth Proportional to 13,322.56, 18,385.68 and 8,289.76

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Solution

The fourth proportional to 13,322.56, 18,385.68 and 8,289.76 is: 11,440.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,322.56 : 18,385.68 = 8,289.76 : x
  2. Step 2: Convert to fraction form
    13,322.56/18,385.68 = 8,289.76/x
  3. Step 3: Cross multiply
    13,322.56x = 18,385.68 × 8,289.76
  4. Step 4: Simplify right side
    13,322.56x = 152,412,874.64
  5. Step 5: Solve for x
    x = 152,412,874.64/13,322.56
  6. Step 6: Final answer
    x = 11,440.21

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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.