Home / 13,629.70-20,444.55-13,111.30

Finding the Fourth Proportional to 13,629.70, 20,444.55 and 13,111.30

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Solution

The fourth proportional to 13,629.70, 20,444.55 and 13,111.30 is: 19,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.70 : 20,444.55 = 13,111.30 : x
  2. Step 2: Convert to fraction form
    13,629.70/20,444.55 = 13,111.30/x
  3. Step 3: Cross multiply
    13,629.70x = 20,444.55 × 13,111.30
  4. Step 4: Simplify right side
    13,629.70x = 268,054,628.42
  5. Step 5: Solve for x
    x = 268,054,628.42/13,629.70
  6. Step 6: Final answer
    x = 19,666.95

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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.