Home / 13,435.06-18,541.88-8,129.76

Finding the Fourth Proportional to 13,435.06, 18,541.88 and 8,129.76

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Solution

The fourth proportional to 13,435.06, 18,541.88 and 8,129.76 is: 11,219.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,435.06 : 18,541.88 = 8,129.76 : x
  2. Step 2: Convert to fraction form
    13,435.06/18,541.88 = 8,129.76/x
  3. Step 3: Cross multiply
    13,435.06x = 18,541.88 × 8,129.76
  4. Step 4: Simplify right side
    13,435.06x = 150,740,900.99
  5. Step 5: Solve for x
    x = 150,740,900.99/13,435.06
  6. Step 6: Final answer
    x = 11,219.97

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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.