Home / 31,399.84-47,139.74-20,352.76

Finding the Fourth Proportional to 31,399.84, 47,139.74 and 20,352.76

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Solution

The fourth proportional to 31,399.84, 47,139.74 and 20,352.76 is: 30,555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,399.84 : 47,139.74 = 20,352.76 : x
  2. Step 2: Convert to fraction form
    31,399.84/47,139.74 = 20,352.76/x
  3. Step 3: Cross multiply
    31,399.84x = 47,139.74 × 20,352.76
  4. Step 4: Simplify right side
    31,399.84x = 959,423,671.39
  5. Step 5: Solve for x
    x = 959,423,671.39/31,399.84
  6. Step 6: Final answer
    x = 30,555.05

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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.