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Finding the Fourth Proportional to 13,765.56, 20,655.90 and 7,197.54

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Solution

The fourth proportional to 13,765.56, 20,655.90 and 7,197.54 is: 10,800.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,765.56 : 20,655.90 = 7,197.54 : x
  2. Step 2: Convert to fraction form
    13,765.56/20,655.90 = 7,197.54/x
  3. Step 3: Cross multiply
    13,765.56x = 20,655.90 × 7,197.54
  4. Step 4: Simplify right side
    13,765.56x = 148,671,666.49
  5. Step 5: Solve for x
    x = 148,671,666.49/13,765.56
  6. Step 6: Final answer
    x = 10,800.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.