Home / 8,624.16-12,938.28-3,078

Finding the Fourth Proportional to 8,624.16, 12,938.28 and 3,078

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Solution

The fourth proportional to 8,624.16, 12,938.28 and 3,078 is: 4,617.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,624.16 : 12,938.28 = 3,078 : x
  2. Step 2: Convert to fraction form
    8,624.16/12,938.28 = 3,078/x
  3. Step 3: Cross multiply
    8,624.16x = 12,938.28 × 3,078
  4. Step 4: Simplify right side
    8,624.16x = 39,824,025.84
  5. Step 5: Solve for x
    x = 39,824,025.84/8,624.16
  6. Step 6: Final answer
    x = 4,617.73

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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.