Home / 20,258.40-30,388.98-12,877.32

Finding the Fourth Proportional to 20,258.40, 30,388.98 and 12,877.32

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Solution

The fourth proportional to 20,258.40, 30,388.98 and 12,877.32 is: 19,316.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.40 : 30,388.98 = 12,877.32 : x
  2. Step 2: Convert to fraction form
    20,258.40/30,388.98 = 12,877.32/x
  3. Step 3: Cross multiply
    20,258.40x = 30,388.98 × 12,877.32
  4. Step 4: Simplify right side
    20,258.40x = 391,328,619.93
  5. Step 5: Solve for x
    x = 391,328,619.93/20,258.40
  6. Step 6: Final answer
    x = 19,316.86

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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.