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Finding the Fourth Proportional to 13,620.64, 18,798.24 and 7,653.46

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Solution

The fourth proportional to 13,620.64, 18,798.24 and 7,653.46 is: 10,562.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.64 : 18,798.24 = 7,653.46 : x
  2. Step 2: Convert to fraction form
    13,620.64/18,798.24 = 7,653.46/x
  3. Step 3: Cross multiply
    13,620.64x = 18,798.24 × 7,653.46
  4. Step 4: Simplify right side
    13,620.64x = 143,871,577.91
  5. Step 5: Solve for x
    x = 143,871,577.91/13,620.64
  6. Step 6: Final answer
    x = 10,562.76

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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.