Home / 13,539.61-18,643.12-11,851.57

Finding the Fourth Proportional to 13,539.61, 18,643.12 and 11,851.57

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Solution

The fourth proportional to 13,539.61, 18,643.12 and 11,851.57 is: 16,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.61 : 18,643.12 = 11,851.57 : x
  2. Step 2: Convert to fraction form
    13,539.61/18,643.12 = 11,851.57/x
  3. Step 3: Cross multiply
    13,539.61x = 18,643.12 × 11,851.57
  4. Step 4: Simplify right side
    13,539.61x = 220,950,241.70
  5. Step 5: Solve for x
    x = 220,950,241.70/13,539.61
  6. Step 6: Final answer
    x = 16,318.80

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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.