Home / 20,411.56-28,169.58-11,459.65

Finding the Fourth Proportional to 20,411.56, 28,169.58 and 11,459.65

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Solution

The fourth proportional to 20,411.56, 28,169.58 and 11,459.65 is: 15,815.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.56 : 28,169.58 = 11,459.65 : x
  2. Step 2: Convert to fraction form
    20,411.56/28,169.58 = 11,459.65/x
  3. Step 3: Cross multiply
    20,411.56x = 28,169.58 × 11,459.65
  4. Step 4: Simplify right side
    20,411.56x = 322,813,527.45
  5. Step 5: Solve for x
    x = 322,813,527.45/20,411.56
  6. Step 6: Final answer
    x = 15,815.23

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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.