Home / 15,890.44-21,929.22-8,720.68

Finding the Fourth Proportional to 15,890.44, 21,929.22 and 8,720.68

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Solution

The fourth proportional to 15,890.44, 21,929.22 and 8,720.68 is: 12,034.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.44 : 21,929.22 = 8,720.68 : x
  2. Step 2: Convert to fraction form
    15,890.44/21,929.22 = 8,720.68/x
  3. Step 3: Cross multiply
    15,890.44x = 21,929.22 × 8,720.68
  4. Step 4: Simplify right side
    15,890.44x = 191,237,710.27
  5. Step 5: Solve for x
    x = 191,237,710.27/15,890.44
  6. Step 6: Final answer
    x = 12,034.76

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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.