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Finding the Fourth Proportional to 7,207.17, 9,945.63 and 4,020.30

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Solution

The fourth proportional to 7,207.17, 9,945.63 and 4,020.30 is: 5,547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,207.17 : 9,945.63 = 4,020.30 : x
  2. Step 2: Convert to fraction form
    7,207.17/9,945.63 = 4,020.30/x
  3. Step 3: Cross multiply
    7,207.17x = 9,945.63 × 4,020.30
  4. Step 4: Simplify right side
    7,207.17x = 39,984,416.29
  5. Step 5: Solve for x
    x = 39,984,416.29/7,207.17
  6. Step 6: Final answer
    x = 5,547.87

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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.