Home / 11,398.64-15,736.70-8,688.57

Finding the Fourth Proportional to 11,398.64, 15,736.70 and 8,688.57

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Solution

The fourth proportional to 11,398.64, 15,736.70 and 8,688.57 is: 11,995.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,398.64 : 15,736.70 = 8,688.57 : x
  2. Step 2: Convert to fraction form
    11,398.64/15,736.70 = 8,688.57/x
  3. Step 3: Cross multiply
    11,398.64x = 15,736.70 × 8,688.57
  4. Step 4: Simplify right side
    11,398.64x = 136,729,376.08
  5. Step 5: Solve for x
    x = 136,729,376.08/11,398.64
  6. Step 6: Final answer
    x = 11,995.24

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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.