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Finding the Fourth Proportional to 18,918.48, 26,105.16 and 10,957.84

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Solution

The fourth proportional to 18,918.48, 26,105.16 and 10,957.84 is: 15,120.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.48 : 26,105.16 = 10,957.84 : x
  2. Step 2: Convert to fraction form
    18,918.48/26,105.16 = 10,957.84/x
  3. Step 3: Cross multiply
    18,918.48x = 26,105.16 × 10,957.84
  4. Step 4: Simplify right side
    18,918.48x = 286,056,166.45
  5. Step 5: Solve for x
    x = 286,056,166.45/18,918.48
  6. Step 6: Final answer
    x = 15,120.46

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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.