Home / 20,639.34-28,464.75-13,923.90

Finding the Fourth Proportional to 20,639.34, 28,464.75 and 13,923.90

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Solution

The fourth proportional to 20,639.34, 28,464.75 and 13,923.90 is: 19,203.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.34 : 28,464.75 = 13,923.90 : x
  2. Step 2: Convert to fraction form
    20,639.34/28,464.75 = 13,923.90/x
  3. Step 3: Cross multiply
    20,639.34x = 28,464.75 × 13,923.90
  4. Step 4: Simplify right side
    20,639.34x = 396,340,332.53
  5. Step 5: Solve for x
    x = 396,340,332.53/20,639.34
  6. Step 6: Final answer
    x = 19,203.15

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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.