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Finding the Fourth Proportional to 12,557.70, 18,839.70 and 5,539.05

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Solution

The fourth proportional to 12,557.70, 18,839.70 and 5,539.05 is: 8,309.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,557.70 : 18,839.70 = 5,539.05 : x
  2. Step 2: Convert to fraction form
    12,557.70/18,839.70 = 5,539.05/x
  3. Step 3: Cross multiply
    12,557.70x = 18,839.70 × 5,539.05
  4. Step 4: Simplify right side
    12,557.70x = 104,354,040.29
  5. Step 5: Solve for x
    x = 104,354,040.29/12,557.70
  6. Step 6: Final answer
    x = 8,309.96

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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.