Home / 31,425.40-47,138.10-30,215.80

Finding the Fourth Proportional to 31,425.40, 47,138.10 and 30,215.80

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Solution

The fourth proportional to 31,425.40, 47,138.10 and 30,215.80 is: 45,323.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,425.40 : 47,138.10 = 30,215.80 : x
  2. Step 2: Convert to fraction form
    31,425.40/47,138.10 = 30,215.80/x
  3. Step 3: Cross multiply
    31,425.40x = 47,138.10 × 30,215.80
  4. Step 4: Simplify right side
    31,425.40x = 1,424,315,401.98
  5. Step 5: Solve for x
    x = 1,424,315,401.98/31,425.40
  6. Step 6: Final answer
    x = 45,323.70

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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.