Home / 20,889.19-31,335.03-8,409.16

Finding the Fourth Proportional to 20,889.19, 31,335.03 and 8,409.16

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Solution

The fourth proportional to 20,889.19, 31,335.03 and 8,409.16 is: 12,614.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.19 : 31,335.03 = 8,409.16 : x
  2. Step 2: Convert to fraction form
    20,889.19/31,335.03 = 8,409.16/x
  3. Step 3: Cross multiply
    20,889.19x = 31,335.03 × 8,409.16
  4. Step 4: Simplify right side
    20,889.19x = 263,501,280.87
  5. Step 5: Solve for x
    x = 263,501,280.87/20,889.19
  6. Step 6: Final answer
    x = 12,614.24

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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.