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Finding the Fourth Proportional to 34,380.55, 51,570.86 and 9,420.80

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Solution

The fourth proportional to 34,380.55, 51,570.86 and 9,420.80 is: 14,131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,380.55 : 51,570.86 = 9,420.80 : x
  2. Step 2: Convert to fraction form
    34,380.55/51,570.86 = 9,420.80/x
  3. Step 3: Cross multiply
    34,380.55x = 51,570.86 × 9,420.80
  4. Step 4: Simplify right side
    34,380.55x = 485,838,757.89
  5. Step 5: Solve for x
    x = 485,838,757.89/34,380.55
  6. Step 6: Final answer
    x = 14,131.21

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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.