Home / 20,491.59-28,279.77-11,418.36

Finding the Fourth Proportional to 20,491.59, 28,279.77 and 11,418.36

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Solution

The fourth proportional to 20,491.59, 28,279.77 and 11,418.36 is: 15,758.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.59 : 28,279.77 = 11,418.36 : x
  2. Step 2: Convert to fraction form
    20,491.59/28,279.77 = 11,418.36/x
  3. Step 3: Cross multiply
    20,491.59x = 28,279.77 × 11,418.36
  4. Step 4: Simplify right side
    20,491.59x = 322,908,594.58
  5. Step 5: Solve for x
    x = 322,908,594.58/20,491.59
  6. Step 6: Final answer
    x = 15,758.10

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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.