Home / 9,115.98-12,579.79-5,137.08

Finding the Fourth Proportional to 9,115.98, 12,579.79 and 5,137.08

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Solution

The fourth proportional to 9,115.98, 12,579.79 and 5,137.08 is: 7,089.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.98 : 12,579.79 = 5,137.08 : x
  2. Step 2: Convert to fraction form
    9,115.98/12,579.79 = 5,137.08/x
  3. Step 3: Cross multiply
    9,115.98x = 12,579.79 × 5,137.08
  4. Step 4: Simplify right side
    9,115.98x = 64,623,387.61
  5. Step 5: Solve for x
    x = 64,623,387.61/9,115.98
  6. Step 6: Final answer
    x = 7,089.02

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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.