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Finding the Fourth Proportional to 13,666.80, 18,860.52 and 7,698.68

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Solution

The fourth proportional to 13,666.80, 18,860.52 and 7,698.68 is: 10,624.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,666.80 : 18,860.52 = 7,698.68 : x
  2. Step 2: Convert to fraction form
    13,666.80/18,860.52 = 7,698.68/x
  3. Step 3: Cross multiply
    13,666.80x = 18,860.52 × 7,698.68
  4. Step 4: Simplify right side
    13,666.80x = 145,201,108.11
  5. Step 5: Solve for x
    x = 145,201,108.11/13,666.80
  6. Step 6: Final answer
    x = 10,624.37

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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.