Home / 15,385.15-21,230.79-8,670.73

Finding the Fourth Proportional to 15,385.15, 21,230.79 and 8,670.73

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Solution

The fourth proportional to 15,385.15, 21,230.79 and 8,670.73 is: 11,965.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.15 : 21,230.79 = 8,670.73 : x
  2. Step 2: Convert to fraction form
    15,385.15/21,230.79 = 8,670.73/x
  3. Step 3: Cross multiply
    15,385.15x = 21,230.79 × 8,670.73
  4. Step 4: Simplify right side
    15,385.15x = 184,086,447.78
  5. Step 5: Solve for x
    x = 184,086,447.78/15,385.15
  6. Step 6: Final answer
    x = 11,965.20

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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.