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Finding the Fourth Proportional to 12,655.80, 18,989.57 and 5,539.10

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Solution

The fourth proportional to 12,655.80, 18,989.57 and 5,539.10 is: 8,311.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.80 : 18,989.57 = 5,539.10 : x
  2. Step 2: Convert to fraction form
    12,655.80/18,989.57 = 5,539.10/x
  3. Step 3: Cross multiply
    12,655.80x = 18,989.57 × 5,539.10
  4. Step 4: Simplify right side
    12,655.80x = 105,185,121.75
  5. Step 5: Solve for x
    x = 105,185,121.75/12,655.80
  6. Step 6: Final answer
    x = 8,311.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.