Home / 21,327.44-31,991.13-9,478.45

Finding the Fourth Proportional to 21,327.44, 31,991.13 and 9,478.45

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Solution

The fourth proportional to 21,327.44, 31,991.13 and 9,478.45 is: 14,217.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.44 : 31,991.13 = 9,478.45 : x
  2. Step 2: Convert to fraction form
    21,327.44/31,991.13 = 9,478.45/x
  3. Step 3: Cross multiply
    21,327.44x = 31,991.13 × 9,478.45
  4. Step 4: Simplify right side
    21,327.44x = 303,226,366.14
  5. Step 5: Solve for x
    x = 303,226,366.14/21,327.44
  6. Step 6: Final answer
    x = 14,217.67

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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.