Home / 7,200-9,931.97-4,215.26

Finding the Fourth Proportional to 7,200, 9,931.97 and 4,215.26

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Solution

The fourth proportional to 7,200, 9,931.97 and 4,215.26 is: 5,814.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200 : 9,931.97 = 4,215.26 : x
  2. Step 2: Convert to fraction form
    7,200/9,931.97 = 4,215.26/x
  3. Step 3: Cross multiply
    7,200x = 9,931.97 × 4,215.26
  4. Step 4: Simplify right side
    7,200x = 41,865,814.79
  5. Step 5: Solve for x
    x = 41,865,814.79/7,200
  6. Step 6: Final answer
    x = 5,814.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.