Home / 20,961.60-31,442.40-18,110.40

Finding the Fourth Proportional to 20,961.60, 31,442.40 and 18,110.40

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Solution

The fourth proportional to 20,961.60, 31,442.40 and 18,110.40 is: 27,165.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.60 : 31,442.40 = 18,110.40 : x
  2. Step 2: Convert to fraction form
    20,961.60/31,442.40 = 18,110.40/x
  3. Step 3: Cross multiply
    20,961.60x = 31,442.40 × 18,110.40
  4. Step 4: Simplify right side
    20,961.60x = 569,434,440.96
  5. Step 5: Solve for x
    x = 569,434,440.96/20,961.60
  6. Step 6: Final answer
    x = 27,165.60

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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.