Home / 15,753.18-21,739.37-8,679.60

Finding the Fourth Proportional to 15,753.18, 21,739.37 and 8,679.60

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Solution

The fourth proportional to 15,753.18, 21,739.37 and 8,679.60 is: 11,977.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.18 : 21,739.37 = 8,679.60 : x
  2. Step 2: Convert to fraction form
    15,753.18/21,739.37 = 8,679.60/x
  3. Step 3: Cross multiply
    15,753.18x = 21,739.37 × 8,679.60
  4. Step 4: Simplify right side
    15,753.18x = 188,688,883.76
  5. Step 5: Solve for x
    x = 188,688,883.76/15,753.18
  6. Step 6: Final answer
    x = 11,977.83

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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.