Home / 12,157.79-16,777.60-6,780.20

Finding the Fourth Proportional to 12,157.79, 16,777.60 and 6,780.20

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Solution

The fourth proportional to 12,157.79, 16,777.60 and 6,780.20 is: 9,356.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.79 : 16,777.60 = 6,780.20 : x
  2. Step 2: Convert to fraction form
    12,157.79/16,777.60 = 6,780.20/x
  3. Step 3: Cross multiply
    12,157.79x = 16,777.60 × 6,780.20
  4. Step 4: Simplify right side
    12,157.79x = 113,755,420.82
  5. Step 5: Solve for x
    x = 113,755,420.82/12,157.79
  6. Step 6: Final answer
    x = 9,356.59

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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.