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Finding the Fourth Proportional to 9,011.80, 13,509.60 and 5,723.20

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Solution

The fourth proportional to 9,011.80, 13,509.60 and 5,723.20 is: 8,579.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,011.80 : 13,509.60 = 5,723.20 : x
  2. Step 2: Convert to fraction form
    9,011.80/13,509.60 = 5,723.20/x
  3. Step 3: Cross multiply
    9,011.80x = 13,509.60 × 5,723.20
  4. Step 4: Simplify right side
    9,011.80x = 77,318,142.72
  5. Step 5: Solve for x
    x = 77,318,142.72/9,011.80
  6. Step 6: Final answer
    x = 8,579.66

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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.