Home / 15,788.76-21,789.12-8,714.94

Finding the Fourth Proportional to 15,788.76, 21,789.12 and 8,714.94

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Solution

The fourth proportional to 15,788.76, 21,789.12 and 8,714.94 is: 12,026.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.76 : 21,789.12 = 8,714.94 : x
  2. Step 2: Convert to fraction form
    15,788.76/21,789.12 = 8,714.94/x
  3. Step 3: Cross multiply
    15,788.76x = 21,789.12 × 8,714.94
  4. Step 4: Simplify right side
    15,788.76x = 189,890,873.45
  5. Step 5: Solve for x
    x = 189,890,873.45/15,788.76
  6. Step 6: Final answer
    x = 12,026.97

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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.