Home / 12,297.12-18,428.40-9,221.28

Finding the Fourth Proportional to 12,297.12, 18,428.40 and 9,221.28

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Solution

The fourth proportional to 12,297.12, 18,428.40 and 9,221.28 is: 13,818.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,297.12 : 18,428.40 = 9,221.28 : x
  2. Step 2: Convert to fraction form
    12,297.12/18,428.40 = 9,221.28/x
  3. Step 3: Cross multiply
    12,297.12x = 18,428.40 × 9,221.28
  4. Step 4: Simplify right side
    12,297.12x = 169,933,436.35
  5. Step 5: Solve for x
    x = 169,933,436.35/12,297.12
  6. Step 6: Final answer
    x = 13,818.96

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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.