Home / 13,271.28-18,315.24-8,787.24

Finding the Fourth Proportional to 13,271.28, 18,315.24 and 8,787.24

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Solution

The fourth proportional to 13,271.28, 18,315.24 and 8,787.24 is: 12,126.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,271.28 : 18,315.24 = 8,787.24 : x
  2. Step 2: Convert to fraction form
    13,271.28/18,315.24 = 8,787.24/x
  3. Step 3: Cross multiply
    13,271.28x = 18,315.24 × 8,787.24
  4. Step 4: Simplify right side
    13,271.28x = 160,940,409.54
  5. Step 5: Solve for x
    x = 160,940,409.54/13,271.28
  6. Step 6: Final answer
    x = 12,126.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.