Home / 11,385.87-15,712.89-6,605.45

Finding the Fourth Proportional to 11,385.87, 15,712.89 and 6,605.45

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Solution

The fourth proportional to 11,385.87, 15,712.89 and 6,605.45 is: 9,115.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.87 : 15,712.89 = 6,605.45 : x
  2. Step 2: Convert to fraction form
    11,385.87/15,712.89 = 6,605.45/x
  3. Step 3: Cross multiply
    11,385.87x = 15,712.89 × 6,605.45
  4. Step 4: Simplify right side
    11,385.87x = 103,790,664.84
  5. Step 5: Solve for x
    x = 103,790,664.84/11,385.87
  6. Step 6: Final answer
    x = 9,115.75

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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.