Home / 5,438.58-8,158.28-1,689.88

Finding the Fourth Proportional to 5,438.58, 8,158.28 and 1,689.88

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Solution

The fourth proportional to 5,438.58, 8,158.28 and 1,689.88 is: 2,534.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,438.58 : 8,158.28 = 1,689.88 : x
  2. Step 2: Convert to fraction form
    5,438.58/8,158.28 = 1,689.88/x
  3. Step 3: Cross multiply
    5,438.58x = 8,158.28 × 1,689.88
  4. Step 4: Simplify right side
    5,438.58x = 13,786,514.21
  5. Step 5: Solve for x
    x = 13,786,514.21/5,438.58
  6. Step 6: Final answer
    x = 2,534.95

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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.