Home / 18,787.49-28,181.75-5,639.86

Finding the Fourth Proportional to 18,787.49, 28,181.75 and 5,639.86

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Solution

The fourth proportional to 18,787.49, 28,181.75 and 5,639.86 is: 8,459.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.49 : 28,181.75 = 5,639.86 : x
  2. Step 2: Convert to fraction form
    18,787.49/28,181.75 = 5,639.86/x
  3. Step 3: Cross multiply
    18,787.49x = 28,181.75 × 5,639.86
  4. Step 4: Simplify right side
    18,787.49x = 158,941,025.90
  5. Step 5: Solve for x
    x = 158,941,025.90/18,787.49
  6. Step 6: Final answer
    x = 8,459.94

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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.