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Finding the Fourth Proportional to 11,159.51, 15,399.99 and 6,443.69

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Solution

The fourth proportional to 11,159.51, 15,399.99 and 6,443.69 is: 8,892.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,159.51 : 15,399.99 = 6,443.69 : x
  2. Step 2: Convert to fraction form
    11,159.51/15,399.99 = 6,443.69/x
  3. Step 3: Cross multiply
    11,159.51x = 15,399.99 × 6,443.69
  4. Step 4: Simplify right side
    11,159.51x = 99,232,684.56
  5. Step 5: Solve for x
    x = 99,232,684.56/11,159.51
  6. Step 6: Final answer
    x = 8,892.21

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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.