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Finding the Fourth Proportional to 13,623.75, 18,801.21 and 7,655.28

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Solution

The fourth proportional to 13,623.75, 18,801.21 and 7,655.28 is: 10,564.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,623.75 : 18,801.21 = 7,655.28 : x
  2. Step 2: Convert to fraction form
    13,623.75/18,801.21 = 7,655.28/x
  3. Step 3: Cross multiply
    13,623.75x = 18,801.21 × 7,655.28
  4. Step 4: Simplify right side
    13,623.75x = 143,928,526.89
  5. Step 5: Solve for x
    x = 143,928,526.89/13,623.75
  6. Step 6: Final answer
    x = 10,564.53

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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.