Home / 21,001.32-31,502.21-8,991.85

Finding the Fourth Proportional to 21,001.32, 31,502.21 and 8,991.85

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Solution

The fourth proportional to 21,001.32, 31,502.21 and 8,991.85 is: 13,487.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.32 : 31,502.21 = 8,991.85 : x
  2. Step 2: Convert to fraction form
    21,001.32/31,502.21 = 8,991.85/x
  3. Step 3: Cross multiply
    21,001.32x = 31,502.21 × 8,991.85
  4. Step 4: Simplify right side
    21,001.32x = 283,263,146.99
  5. Step 5: Solve for x
    x = 283,263,146.99/21,001.32
  6. Step 6: Final answer
    x = 13,487.87

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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.