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Finding the Fourth Proportional to 11,102.80, 15,321 and 6,386.17

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Solution

The fourth proportional to 11,102.80, 15,321 and 6,386.17 is: 8,812.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,102.80 : 15,321 = 6,386.17 : x
  2. Step 2: Convert to fraction form
    11,102.80/15,321 = 6,386.17/x
  3. Step 3: Cross multiply
    11,102.80x = 15,321 × 6,386.17
  4. Step 4: Simplify right side
    11,102.80x = 97,842,510.57
  5. Step 5: Solve for x
    x = 97,842,510.57/11,102.80
  6. Step 6: Final answer
    x = 8,812.42

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Double scale
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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.