Home / 31,420.75-47,131.13-8,047.20

Finding the Fourth Proportional to 31,420.75, 47,131.13 and 8,047.20

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Solution

The fourth proportional to 31,420.75, 47,131.13 and 8,047.20 is: 12,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.75 : 47,131.13 = 8,047.20 : x
  2. Step 2: Convert to fraction form
    31,420.75/47,131.13 = 8,047.20/x
  3. Step 3: Cross multiply
    31,420.75x = 47,131.13 × 8,047.20
  4. Step 4: Simplify right side
    31,420.75x = 379,273,629.34
  5. Step 5: Solve for x
    x = 379,273,629.34/31,420.75
  6. Step 6: Final answer
    x = 12,070.80

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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.