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Finding the Fourth Proportional to 7,485.75, 11,216.75 and 5,011.47

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Solution

The fourth proportional to 7,485.75, 11,216.75 and 5,011.47 is: 7,509.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.75 : 11,216.75 = 5,011.47 : x
  2. Step 2: Convert to fraction form
    7,485.75/11,216.75 = 5,011.47/x
  3. Step 3: Cross multiply
    7,485.75x = 11,216.75 × 5,011.47
  4. Step 4: Simplify right side
    7,485.75x = 56,212,381.07
  5. Step 5: Solve for x
    x = 56,212,381.07/7,485.75
  6. Step 6: Final answer
    x = 7,509.25

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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.