Home / 13,539.28-18,693.01-12,120.55

Finding the Fourth Proportional to 13,539.28, 18,693.01 and 12,120.55

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Solution

The fourth proportional to 13,539.28, 18,693.01 and 12,120.55 is: 16,734.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.28 : 18,693.01 = 12,120.55 : x
  2. Step 2: Convert to fraction form
    13,539.28/18,693.01 = 12,120.55/x
  3. Step 3: Cross multiply
    13,539.28x = 18,693.01 × 12,120.55
  4. Step 4: Simplify right side
    13,539.28x = 226,569,562.36
  5. Step 5: Solve for x
    x = 226,569,562.36/13,539.28
  6. Step 6: Final answer
    x = 16,734.24

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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.