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Finding the Fourth Proportional to 13,620.80, 18,798.59 and 7,652.92

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Solution

The fourth proportional to 13,620.80, 18,798.59 and 7,652.92 is: 10,562.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.80 : 18,798.59 = 7,652.92 : x
  2. Step 2: Convert to fraction form
    13,620.80/18,798.59 = 7,652.92/x
  3. Step 3: Cross multiply
    13,620.80x = 18,798.59 × 7,652.92
  4. Step 4: Simplify right side
    13,620.80x = 143,863,973.13
  5. Step 5: Solve for x
    x = 143,863,973.13/13,620.80
  6. Step 6: Final answer
    x = 10,562.08

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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.