Home / 20,719.14-31,029.21-11,345.10

Finding the Fourth Proportional to 20,719.14, 31,029.21 and 11,345.10

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Solution

The fourth proportional to 20,719.14, 31,029.21 and 11,345.10 is: 16,990.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.14 : 31,029.21 = 11,345.10 : x
  2. Step 2: Convert to fraction form
    20,719.14/31,029.21 = 11,345.10/x
  3. Step 3: Cross multiply
    20,719.14x = 31,029.21 × 11,345.10
  4. Step 4: Simplify right side
    20,719.14x = 352,029,490.37
  5. Step 5: Solve for x
    x = 352,029,490.37/20,719.14
  6. Step 6: Final answer
    x = 16,990.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.