Home / 15,385.45-21,231.48-8,670.96

Finding the Fourth Proportional to 15,385.45, 21,231.48 and 8,670.96

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Solution

The fourth proportional to 15,385.45, 21,231.48 and 8,670.96 is: 11,965.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.45 : 21,231.48 = 8,670.96 : x
  2. Step 2: Convert to fraction form
    15,385.45/21,231.48 = 8,670.96/x
  3. Step 3: Cross multiply
    15,385.45x = 21,231.48 × 8,670.96
  4. Step 4: Simplify right side
    15,385.45x = 184,097,313.82
  5. Step 5: Solve for x
    x = 184,097,313.82/15,385.45
  6. Step 6: Final answer
    x = 11,965.68

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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.