Home / 9,115.59-12,579.15-5,137.50

Finding the Fourth Proportional to 9,115.59, 12,579.15 and 5,137.50

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Solution

The fourth proportional to 9,115.59, 12,579.15 and 5,137.50 is: 7,089.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.59 : 12,579.15 = 5,137.50 : x
  2. Step 2: Convert to fraction form
    9,115.59/12,579.15 = 5,137.50/x
  3. Step 3: Cross multiply
    9,115.59x = 12,579.15 × 5,137.50
  4. Step 4: Simplify right side
    9,115.59x = 64,625,383.13
  5. Step 5: Solve for x
    x = 64,625,383.13/9,115.59
  6. Step 6: Final answer
    x = 7,089.54

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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.