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Finding the Fourth Proportional to 8,485.80, 12,750.30 and 7,535.40

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Solution

The fourth proportional to 8,485.80, 12,750.30 and 7,535.40 is: 11,322.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.80 : 12,750.30 = 7,535.40 : x
  2. Step 2: Convert to fraction form
    8,485.80/12,750.30 = 7,535.40/x
  3. Step 3: Cross multiply
    8,485.80x = 12,750.30 × 7,535.40
  4. Step 4: Simplify right side
    8,485.80x = 96,078,610.62
  5. Step 5: Solve for x
    x = 96,078,610.62/8,485.80
  6. Step 6: Final answer
    x = 11,322.28

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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.