Home / 11,490.80-15,858.18-6,455.34

Finding the Fourth Proportional to 11,490.80, 15,858.18 and 6,455.34

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Solution

The fourth proportional to 11,490.80, 15,858.18 and 6,455.34 is: 8,908.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,490.80 : 15,858.18 = 6,455.34 : x
  2. Step 2: Convert to fraction form
    11,490.80/15,858.18 = 6,455.34/x
  3. Step 3: Cross multiply
    11,490.80x = 15,858.18 × 6,455.34
  4. Step 4: Simplify right side
    11,490.80x = 102,369,943.68
  5. Step 5: Solve for x
    x = 102,369,943.68/11,490.80
  6. Step 6: Final answer
    x = 8,908.87

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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.