Home / 9,135.88-12,607.68-5,157.08

Finding the Fourth Proportional to 9,135.88, 12,607.68 and 5,157.08

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Solution

The fourth proportional to 9,135.88, 12,607.68 and 5,157.08 is: 7,116.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,135.88 : 12,607.68 = 5,157.08 : x
  2. Step 2: Convert to fraction form
    9,135.88/12,607.68 = 5,157.08/x
  3. Step 3: Cross multiply
    9,135.88x = 12,607.68 × 5,157.08
  4. Step 4: Simplify right side
    9,135.88x = 65,018,814.37
  5. Step 5: Solve for x
    x = 65,018,814.37/9,135.88
  6. Step 6: Final answer
    x = 7,116.86

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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.