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Finding the Fourth Proportional to 13,347.54, 18,420.21 and 7,757.46

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Solution

The fourth proportional to 13,347.54, 18,420.21 and 7,757.46 is: 10,705.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.54 : 18,420.21 = 7,757.46 : x
  2. Step 2: Convert to fraction form
    13,347.54/18,420.21 = 7,757.46/x
  3. Step 3: Cross multiply
    13,347.54x = 18,420.21 × 7,757.46
  4. Step 4: Simplify right side
    13,347.54x = 142,894,042.27
  5. Step 5: Solve for x
    x = 142,894,042.27/13,347.54
  6. Step 6: Final answer
    x = 10,705.65

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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.