Home / 11,115.60-15,341.58-7,141.68

Finding the Fourth Proportional to 11,115.60, 15,341.58 and 7,141.68

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Solution

The fourth proportional to 11,115.60, 15,341.58 and 7,141.68 is: 9,856.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.60 : 15,341.58 = 7,141.68 : x
  2. Step 2: Convert to fraction form
    11,115.60/15,341.58 = 7,141.68/x
  3. Step 3: Cross multiply
    11,115.60x = 15,341.58 × 7,141.68
  4. Step 4: Simplify right side
    11,115.60x = 109,564,655.05
  5. Step 5: Solve for x
    x = 109,564,655.05/11,115.60
  6. Step 6: Final answer
    x = 9,856.84

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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.