Home / 20,911.98-28,848.78-12,951.30

Finding the Fourth Proportional to 20,911.98, 28,848.78 and 12,951.30

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Solution

The fourth proportional to 20,911.98, 28,848.78 and 12,951.30 is: 17,866.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.98 : 28,848.78 = 12,951.30 : x
  2. Step 2: Convert to fraction form
    20,911.98/28,848.78 = 12,951.30/x
  3. Step 3: Cross multiply
    20,911.98x = 28,848.78 × 12,951.30
  4. Step 4: Simplify right side
    20,911.98x = 373,629,204.41
  5. Step 5: Solve for x
    x = 373,629,204.41/20,911.98
  6. Step 6: Final answer
    x = 17,866.75

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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.