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Finding the Fourth Proportional to 11,101.88, 15,321.06 and 6,386.17

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Solution

The fourth proportional to 11,101.88, 15,321.06 and 6,386.17 is: 8,813.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,101.88 : 15,321.06 = 6,386.17 : x
  2. Step 2: Convert to fraction form
    11,101.88/15,321.06 = 6,386.17/x
  3. Step 3: Cross multiply
    11,101.88x = 15,321.06 × 6,386.17
  4. Step 4: Simplify right side
    11,101.88x = 97,842,817.13
  5. Step 5: Solve for x
    x = 97,842,817.13/11,101.88
  6. Step 6: Final answer
    x = 8,813.18

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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.