Home / 13,405.35-18,490.98-8,631.51

Finding the Fourth Proportional to 13,405.35, 18,490.98 and 8,631.51

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Solution

The fourth proportional to 13,405.35, 18,490.98 and 8,631.51 is: 11,906.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,405.35 : 18,490.98 = 8,631.51 : x
  2. Step 2: Convert to fraction form
    13,405.35/18,490.98 = 8,631.51/x
  3. Step 3: Cross multiply
    13,405.35x = 18,490.98 × 8,631.51
  4. Step 4: Simplify right side
    13,405.35x = 159,605,145.82
  5. Step 5: Solve for x
    x = 159,605,145.82/13,405.35
  6. Step 6: Final answer
    x = 11,906.08

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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.