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Finding the Fourth Proportional to 14,961.80, 20,920.60 and 14,961.80

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Solution

The fourth proportional to 14,961.80, 20,920.60 and 14,961.80 is: 20,920.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,961.80 : 20,920.60 = 14,961.80 : x
  2. Step 2: Convert to fraction form
    14,961.80/20,920.60 = 14,961.80/x
  3. Step 3: Cross multiply
    14,961.80x = 20,920.60 × 14,961.80
  4. Step 4: Simplify right side
    14,961.80x = 313,009,833.08
  5. Step 5: Solve for x
    x = 313,009,833.08/14,961.80
  6. Step 6: Final answer
    x = 20,920.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.