Home / 31,440.80-47,161.20-12,729.80

Finding the Fourth Proportional to 31,440.80, 47,161.20 and 12,729.80

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Solution

The fourth proportional to 31,440.80, 47,161.20 and 12,729.80 is: 19,094.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,440.80 : 47,161.20 = 12,729.80 : x
  2. Step 2: Convert to fraction form
    31,440.80/47,161.20 = 12,729.80/x
  3. Step 3: Cross multiply
    31,440.80x = 47,161.20 × 12,729.80
  4. Step 4: Simplify right side
    31,440.80x = 600,352,643.76
  5. Step 5: Solve for x
    x = 600,352,643.76/31,440.80
  6. Step 6: Final answer
    x = 19,094.70

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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.