Home / 7,206.40-9,945.12-4,222.72

Finding the Fourth Proportional to 7,206.40, 9,945.12 and 4,222.72

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Solution

The fourth proportional to 7,206.40, 9,945.12 and 4,222.72 is: 5,827.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,206.40 : 9,945.12 = 4,222.72 : x
  2. Step 2: Convert to fraction form
    7,206.40/9,945.12 = 4,222.72/x
  3. Step 3: Cross multiply
    7,206.40x = 9,945.12 × 4,222.72
  4. Step 4: Simplify right side
    7,206.40x = 41,995,457.13
  5. Step 5: Solve for x
    x = 41,995,457.13/7,206.40
  6. Step 6: Final answer
    x = 5,827.52

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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.