Home / 12,318.48-18,475.29-4,420.78

Finding the Fourth Proportional to 12,318.48, 18,475.29 and 4,420.78

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Solution

The fourth proportional to 12,318.48, 18,475.29 and 4,420.78 is: 6,630.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.48 : 18,475.29 = 4,420.78 : x
  2. Step 2: Convert to fraction form
    12,318.48/18,475.29 = 4,420.78/x
  3. Step 3: Cross multiply
    12,318.48x = 18,475.29 × 4,420.78
  4. Step 4: Simplify right side
    12,318.48x = 81,675,146.34
  5. Step 5: Solve for x
    x = 81,675,146.34/12,318.48
  6. Step 6: Final answer
    x = 6,630.29

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1.5x scale

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.