Home / 21,315.96-31,932.41-12,975.30

Finding the Fourth Proportional to 21,315.96, 31,932.41 and 12,975.30

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Solution

The fourth proportional to 21,315.96, 31,932.41 and 12,975.30 is: 19,437.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.96 : 31,932.41 = 12,975.30 : x
  2. Step 2: Convert to fraction form
    21,315.96/31,932.41 = 12,975.30/x
  3. Step 3: Cross multiply
    21,315.96x = 31,932.41 × 12,975.30
  4. Step 4: Simplify right side
    21,315.96x = 414,332,534.60
  5. Step 5: Solve for x
    x = 414,332,534.60/21,315.96
  6. Step 6: Final answer
    x = 19,437.67

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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.