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Finding the Fourth Proportional to 12,719.84, 17,553.48 and 7,130.84

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Solution

The fourth proportional to 12,719.84, 17,553.48 and 7,130.84 is: 9,840.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,719.84 : 17,553.48 = 7,130.84 : x
  2. Step 2: Convert to fraction form
    12,719.84/17,553.48 = 7,130.84/x
  3. Step 3: Cross multiply
    12,719.84x = 17,553.48 × 7,130.84
  4. Step 4: Simplify right side
    12,719.84x = 125,171,057.32
  5. Step 5: Solve for x
    x = 125,171,057.32/12,719.84
  6. Step 6: Final answer
    x = 9,840.62

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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.