Home / 21,001.89-31,502.34-8,518.56

Finding the Fourth Proportional to 21,001.89, 31,502.34 and 8,518.56

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Solution

The fourth proportional to 21,001.89, 31,502.34 and 8,518.56 is: 12,777.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.89 : 31,502.34 = 8,518.56 : x
  2. Step 2: Convert to fraction form
    21,001.89/31,502.34 = 8,518.56/x
  3. Step 3: Cross multiply
    21,001.89x = 31,502.34 × 8,518.56
  4. Step 4: Simplify right side
    21,001.89x = 268,354,573.43
  5. Step 5: Solve for x
    x = 268,354,573.43/21,001.89
  6. Step 6: Final answer
    x = 12,777.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.