Home / 8,390.96-12,586.76-3,127.28

Finding the Fourth Proportional to 8,390.96, 12,586.76 and 3,127.28

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Solution

The fourth proportional to 8,390.96, 12,586.76 and 3,127.28 is: 4,691.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.96 : 12,586.76 = 3,127.28 : x
  2. Step 2: Convert to fraction form
    8,390.96/12,586.76 = 3,127.28/x
  3. Step 3: Cross multiply
    8,390.96x = 12,586.76 × 3,127.28
  4. Step 4: Simplify right side
    8,390.96x = 39,362,322.81
  5. Step 5: Solve for x
    x = 39,362,322.81/8,390.96
  6. Step 6: Final answer
    x = 4,691.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.