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Finding the Fourth Proportional to 15,777.59, 21,772.94 and 8,703.99

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Solution

The fourth proportional to 15,777.59, 21,772.94 and 8,703.99 is: 12,011.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.59 : 21,772.94 = 8,703.99 : x
  2. Step 2: Convert to fraction form
    15,777.59/21,772.94 = 8,703.99/x
  3. Step 3: Cross multiply
    15,777.59x = 21,772.94 × 8,703.99
  4. Step 4: Simplify right side
    15,777.59x = 189,511,408.51
  5. Step 5: Solve for x
    x = 189,511,408.51/15,777.59
  6. Step 6: Final answer
    x = 12,011.43

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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.