Home / 12,420.28-18,624.21-3,985.66

Finding the Fourth Proportional to 12,420.28, 18,624.21 and 3,985.66

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Solution

The fourth proportional to 12,420.28, 18,624.21 and 3,985.66 is: 5,976.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.28 : 18,624.21 = 3,985.66 : x
  2. Step 2: Convert to fraction form
    12,420.28/18,624.21 = 3,985.66/x
  3. Step 3: Cross multiply
    12,420.28x = 18,624.21 × 3,985.66
  4. Step 4: Simplify right side
    12,420.28x = 74,229,768.83
  5. Step 5: Solve for x
    x = 74,229,768.83/12,420.28
  6. Step 6: Final answer
    x = 5,976.50

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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.