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Finding the Fourth Proportional to 8,700.40, 13,050.60 and 3,505.08

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Solution

The fourth proportional to 8,700.40, 13,050.60 and 3,505.08 is: 5,257.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.40 : 13,050.60 = 3,505.08 : x
  2. Step 2: Convert to fraction form
    8,700.40/13,050.60 = 3,505.08/x
  3. Step 3: Cross multiply
    8,700.40x = 13,050.60 × 3,505.08
  4. Step 4: Simplify right side
    8,700.40x = 45,743,397.05
  5. Step 5: Solve for x
    x = 45,743,397.05/8,700.40
  6. Step 6: Final answer
    x = 5,257.62

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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.