Home / 13,687.10-20,521.53-4,920.88

Finding the Fourth Proportional to 13,687.10, 20,521.53 and 4,920.88

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Solution

The fourth proportional to 13,687.10, 20,521.53 and 4,920.88 is: 7,378.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.10 : 20,521.53 = 4,920.88 : x
  2. Step 2: Convert to fraction form
    13,687.10/20,521.53 = 4,920.88/x
  3. Step 3: Cross multiply
    13,687.10x = 20,521.53 × 4,920.88
  4. Step 4: Simplify right side
    13,687.10x = 100,983,986.55
  5. Step 5: Solve for x
    x = 100,983,986.55/13,687.10
  6. Step 6: Final answer
    x = 7,378.04

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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.