Home / 15,471.72-21,349.20-8,664.79

Finding the Fourth Proportional to 15,471.72, 21,349.20 and 8,664.79

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Solution

The fourth proportional to 15,471.72, 21,349.20 and 8,664.79 is: 11,956.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.72 : 21,349.20 = 8,664.79 : x
  2. Step 2: Convert to fraction form
    15,471.72/21,349.20 = 8,664.79/x
  3. Step 3: Cross multiply
    15,471.72x = 21,349.20 × 8,664.79
  4. Step 4: Simplify right side
    15,471.72x = 184,986,334.67
  5. Step 5: Solve for x
    x = 184,986,334.67/15,471.72
  6. Step 6: Final answer
    x = 11,956.42

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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.