Home / 31,631.58-47,447.37-12,920.45

Finding the Fourth Proportional to 31,631.58, 47,447.37 and 12,920.45

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Solution

The fourth proportional to 31,631.58, 47,447.37 and 12,920.45 is: 19,380.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,631.58 : 47,447.37 = 12,920.45 : x
  2. Step 2: Convert to fraction form
    31,631.58/47,447.37 = 12,920.45/x
  3. Step 3: Cross multiply
    31,631.58x = 47,447.37 × 12,920.45
  4. Step 4: Simplify right side
    31,631.58x = 613,041,134.48
  5. Step 5: Solve for x
    x = 613,041,134.48/31,631.58
  6. Step 6: Final answer
    x = 19,380.67

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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.