Home / 6,220.80-8,575.20-5,385.60

Finding the Fourth Proportional to 6,220.80, 8,575.20 and 5,385.60

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Solution

The fourth proportional to 6,220.80, 8,575.20 and 5,385.60 is: 7,423.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,220.80 : 8,575.20 = 5,385.60 : x
  2. Step 2: Convert to fraction form
    6,220.80/8,575.20 = 5,385.60/x
  3. Step 3: Cross multiply
    6,220.80x = 8,575.20 × 5,385.60
  4. Step 4: Simplify right side
    6,220.80x = 46,182,597.12
  5. Step 5: Solve for x
    x = 46,182,597.12/6,220.80
  6. Step 6: Final answer
    x = 7,423.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.