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Finding the Fourth Proportional to 12,155.61, 16,774.65 and 6,777.99

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Solution

The fourth proportional to 12,155.61, 16,774.65 and 6,777.99 is: 9,353.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,155.61 : 16,774.65 = 6,777.99 : x
  2. Step 2: Convert to fraction form
    12,155.61/16,774.65 = 6,777.99/x
  3. Step 3: Cross multiply
    12,155.61x = 16,774.65 × 6,777.99
  4. Step 4: Simplify right side
    12,155.61x = 113,698,409.95
  5. Step 5: Solve for x
    x = 113,698,409.95/12,155.61
  6. Step 6: Final answer
    x = 9,353.58

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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.