Home / 12,438.40-18,659.31-4,539.88

Finding the Fourth Proportional to 12,438.40, 18,659.31 and 4,539.88

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Solution

The fourth proportional to 12,438.40, 18,659.31 and 4,539.88 is: 6,810.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.40 : 18,659.31 = 4,539.88 : x
  2. Step 2: Convert to fraction form
    12,438.40/18,659.31 = 4,539.88/x
  3. Step 3: Cross multiply
    12,438.40x = 18,659.31 × 4,539.88
  4. Step 4: Simplify right side
    12,438.40x = 84,711,028.28
  5. Step 5: Solve for x
    x = 84,711,028.28/12,438.40
  6. Step 6: Final answer
    x = 6,810.44

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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.