Home / 9,157.90-12,638.70-5,179.72

Finding the Fourth Proportional to 9,157.90, 12,638.70 and 5,179.72

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Solution

The fourth proportional to 9,157.90, 12,638.70 and 5,179.72 is: 7,148.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,157.90 : 12,638.70 = 5,179.72 : x
  2. Step 2: Convert to fraction form
    9,157.90/12,638.70 = 5,179.72/x
  3. Step 3: Cross multiply
    9,157.90x = 12,638.70 × 5,179.72
  4. Step 4: Simplify right side
    9,157.90x = 65,464,927.16
  5. Step 5: Solve for x
    x = 65,464,927.16/9,157.90
  6. Step 6: Final answer
    x = 7,148.46

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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.