Home / 15,385.07-21,231.39-8,670.94

Finding the Fourth Proportional to 15,385.07, 21,231.39 and 8,670.94

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Solution

The fourth proportional to 15,385.07, 21,231.39 and 8,670.94 is: 11,965.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.07 : 21,231.39 = 8,670.94 : x
  2. Step 2: Convert to fraction form
    15,385.07/21,231.39 = 8,670.94/x
  3. Step 3: Cross multiply
    15,385.07x = 21,231.39 × 8,670.94
  4. Step 4: Simplify right side
    15,385.07x = 184,096,055.73
  5. Step 5: Solve for x
    x = 184,096,055.73/15,385.07
  6. Step 6: Final answer
    x = 11,965.89

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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.