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Finding the Fourth Proportional to 13,679.66, 18,878.31 and 7,710.98

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Solution

The fourth proportional to 13,679.66, 18,878.31 and 7,710.98 is: 10,641.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.66 : 18,878.31 = 7,710.98 : x
  2. Step 2: Convert to fraction form
    13,679.66/18,878.31 = 7,710.98/x
  3. Step 3: Cross multiply
    13,679.66x = 18,878.31 × 7,710.98
  4. Step 4: Simplify right side
    13,679.66x = 145,570,176.45
  5. Step 5: Solve for x
    x = 145,570,176.45/13,679.66
  6. Step 6: Final answer
    x = 10,641.36

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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.