Home / 15,380.72-21,235.20-12,554.82

Finding the Fourth Proportional to 15,380.72, 21,235.20 and 12,554.82

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Solution

The fourth proportional to 15,380.72, 21,235.20 and 12,554.82 is: 17,333.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.72 : 21,235.20 = 12,554.82 : x
  2. Step 2: Convert to fraction form
    15,380.72/21,235.20 = 12,554.82/x
  3. Step 3: Cross multiply
    15,380.72x = 21,235.20 × 12,554.82
  4. Step 4: Simplify right side
    15,380.72x = 266,604,113.66
  5. Step 5: Solve for x
    x = 266,604,113.66/15,380.72
  6. Step 6: Final answer
    x = 17,333.66

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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.