Home / 15,489.98-21,377.58-8,777.77

Finding the Fourth Proportional to 15,489.98, 21,377.58 and 8,777.77

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Solution

The fourth proportional to 15,489.98, 21,377.58 and 8,777.77 is: 12,114.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.98 : 21,377.58 = 8,777.77 : x
  2. Step 2: Convert to fraction form
    15,489.98/21,377.58 = 8,777.77/x
  3. Step 3: Cross multiply
    15,489.98x = 21,377.58 × 8,777.77
  4. Step 4: Simplify right side
    15,489.98x = 187,647,557.21
  5. Step 5: Solve for x
    x = 187,647,557.21/15,489.98
  6. Step 6: Final answer
    x = 12,114.12

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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.