Home / 20,639.98-28,494.99-13,586.91

Finding the Fourth Proportional to 20,639.98, 28,494.99 and 13,586.91

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Solution

The fourth proportional to 20,639.98, 28,494.99 and 13,586.91 is: 18,757.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.98 : 28,494.99 = 13,586.91 : x
  2. Step 2: Convert to fraction form
    20,639.98/28,494.99 = 13,586.91/x
  3. Step 3: Cross multiply
    20,639.98x = 28,494.99 × 13,586.91
  4. Step 4: Simplify right side
    20,639.98x = 387,158,774.84
  5. Step 5: Solve for x
    x = 387,158,774.84/20,639.98
  6. Step 6: Final answer
    x = 18,757.71

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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.