Home / 9,135.87-12,607.70-5,156.75

Finding the Fourth Proportional to 9,135.87, 12,607.70 and 5,156.75

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Solution

The fourth proportional to 9,135.87, 12,607.70 and 5,156.75 is: 7,116.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.87 : 12,607.70 = 5,156.75 : x
  2. Step 2: Convert to fraction form
    9,135.87/12,607.70 = 5,156.75/x
  3. Step 3: Cross multiply
    9,135.87x = 12,607.70 × 5,156.75
  4. Step 4: Simplify right side
    9,135.87x = 65,014,668.15
  5. Step 5: Solve for x
    x = 65,014,668.15/9,135.87
  6. Step 6: Final answer
    x = 7,116.42

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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.