Home / 20,495.57-28,288.49-13,417.88

Finding the Fourth Proportional to 20,495.57, 28,288.49 and 13,417.88

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Solution

The fourth proportional to 20,495.57, 28,288.49 and 13,417.88 is: 18,519.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.57 : 28,288.49 = 13,417.88 : x
  2. Step 2: Convert to fraction form
    20,495.57/28,288.49 = 13,417.88/x
  3. Step 3: Cross multiply
    20,495.57x = 28,288.49 × 13,417.88
  4. Step 4: Simplify right side
    20,495.57x = 379,571,355.67
  5. Step 5: Solve for x
    x = 379,571,355.67/20,495.57
  6. Step 6: Final answer
    x = 18,519.68

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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.