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Finding the Fourth Proportional to 13,710.54, 18,921.29 and 7,742.46

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Solution

The fourth proportional to 13,710.54, 18,921.29 and 7,742.46 is: 10,685.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.54 : 18,921.29 = 7,742.46 : x
  2. Step 2: Convert to fraction form
    13,710.54/18,921.29 = 7,742.46/x
  3. Step 3: Cross multiply
    13,710.54x = 18,921.29 × 7,742.46
  4. Step 4: Simplify right side
    13,710.54x = 146,497,292.26
  5. Step 5: Solve for x
    x = 146,497,292.26/13,710.54
  6. Step 6: Final answer
    x = 10,685.01

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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.