Home / 20,671.33-28,530.40-11,718.87

Finding the Fourth Proportional to 20,671.33, 28,530.40 and 11,718.87

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Solution

The fourth proportional to 20,671.33, 28,530.40 and 11,718.87 is: 16,174.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.33 : 28,530.40 = 11,718.87 : x
  2. Step 2: Convert to fraction form
    20,671.33/28,530.40 = 11,718.87/x
  3. Step 3: Cross multiply
    20,671.33x = 28,530.40 × 11,718.87
  4. Step 4: Simplify right side
    20,671.33x = 334,343,990.05
  5. Step 5: Solve for x
    x = 334,343,990.05/20,671.33
  6. Step 6: Final answer
    x = 16,174.29

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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.