Home / 12,219.84-18,318.72-7,528.32

Finding the Fourth Proportional to 12,219.84, 18,318.72 and 7,528.32

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Solution

The fourth proportional to 12,219.84, 18,318.72 and 7,528.32 is: 11,285.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.84 : 18,318.72 = 7,528.32 : x
  2. Step 2: Convert to fraction form
    12,219.84/18,318.72 = 7,528.32/x
  3. Step 3: Cross multiply
    12,219.84x = 18,318.72 × 7,528.32
  4. Step 4: Simplify right side
    12,219.84x = 137,909,186.15
  5. Step 5: Solve for x
    x = 137,909,186.15/12,219.84
  6. Step 6: Final answer
    x = 11,285.68

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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.