Home / 5,438.34-8,157.91-1,689.63

Finding the Fourth Proportional to 5,438.34, 8,157.91 and 1,689.63

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Solution

The fourth proportional to 5,438.34, 8,157.91 and 1,689.63 is: 2,534.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,438.34 : 8,157.91 = 1,689.63 : x
  2. Step 2: Convert to fraction form
    5,438.34/8,157.91 = 1,689.63/x
  3. Step 3: Cross multiply
    5,438.34x = 8,157.91 × 1,689.63
  4. Step 4: Simplify right side
    5,438.34x = 13,783,849.47
  5. Step 5: Solve for x
    x = 13,783,849.47/5,438.34
  6. Step 6: Final answer
    x = 2,534.57

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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.