Home / 19,639.20-29,458.80-13,821.76

Finding the Fourth Proportional to 19,639.20, 29,458.80 and 13,821.76

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Solution

The fourth proportional to 19,639.20, 29,458.80 and 13,821.76 is: 20,732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.20 : 29,458.80 = 13,821.76 : x
  2. Step 2: Convert to fraction form
    19,639.20/29,458.80 = 13,821.76/x
  3. Step 3: Cross multiply
    19,639.20x = 29,458.80 × 13,821.76
  4. Step 4: Simplify right side
    19,639.20x = 407,172,463.49
  5. Step 5: Solve for x
    x = 407,172,463.49/19,639.20
  6. Step 6: Final answer
    x = 20,732.64

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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.