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Finding the Fourth Proportional to 7,485.48, 11,205.72 and 4,984.20

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Solution

The fourth proportional to 7,485.48, 11,205.72 and 4,984.20 is: 7,461.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.48 : 11,205.72 = 4,984.20 : x
  2. Step 2: Convert to fraction form
    7,485.48/11,205.72 = 4,984.20/x
  3. Step 3: Cross multiply
    7,485.48x = 11,205.72 × 4,984.20
  4. Step 4: Simplify right side
    7,485.48x = 55,851,549.62
  5. Step 5: Solve for x
    x = 55,851,549.62/7,485.48
  6. Step 6: Final answer
    x = 7,461.32

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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.