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Finding the Fourth Proportional to 12,885.95, 19,333.52 and 7,949.84

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Solution

The fourth proportional to 12,885.95, 19,333.52 and 7,949.84 is: 11,927.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.95 : 19,333.52 = 7,949.84 : x
  2. Step 2: Convert to fraction form
    12,885.95/19,333.52 = 7,949.84/x
  3. Step 3: Cross multiply
    12,885.95x = 19,333.52 × 7,949.84
  4. Step 4: Simplify right side
    12,885.95x = 153,698,254.22
  5. Step 5: Solve for x
    x = 153,698,254.22/12,885.95
  6. Step 6: Final answer
    x = 11,927.59

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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.